Knowledge (XXG)

Isotopes of uranium

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7481: 6767: 4376:"The isotopic analyses disclosed a species of mass 248 in constant abundance in three samples analysed over a period of about 10 months. This was ascribed to an isomer of Bk with a half-life greater than 9 . No growth of Cf was detected, and a lower limit for the β half-life can be set at about 10 . No alpha activity attributable to the new isomer has been detected; the alpha half-life is probably greater than 300 ." 7173: 6373: 4003:
B.; Lu, Z. W.; Xu, X. X.; Duan, L. M.; Yang, H. R.; Huang, W. X.; Liu, Z.; Zhou, X. H.; Zhang, Y. H.; Xu, H. S.; Wang, N.; Zhou, H. B.; Wen, X. J.; Huang, S.; Hua, W.; Zhu, L.; Wang, X.; Mao, Y. C.; He, X. T.; Wang, S. Y.; Xu, W. Z.; Li, H. W.; Niu, Y. F.; Guo, L.; Ren, Z. Z.; Zhou, S. G. (4 August 2022). "Fine structure in the α decay of the 8+ isomer in U".
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X.; Liu, Z.; Zhou, X. H.; Zhang, Y. H.; Xu, H. S.; Wang, N.; Zhou, H. B.; Wen, X. J.; Huang, S.; Hua, W.; Zhu, L.; Wang, X.; Mao, Y. C.; He, X. T.; Wang, S. Y.; Xu, W. Z.; Li, H. W.; Ren, Z. Z.; Zhou, S. G. (2021). "New α-Emitting Isotope 214 and Abnormal Enhancement of α-Particle Clustering in Lightest Uranium Isotopes".
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Zhang, Z. Y.; Yang, H. B.; Huang, M. H.; Gan, Z. G.; Yuan, C. X.; Qi, C.; Andreyev, A. N.; Liu, M. L.; Ma, L.; Zhang, M. M.; Tian, Y. L.; Wang, Y. S.; Wang, J. G.; Yang, C. L.; Li, G. S.; Qiang, Y. H.; Yang, W. Q.; Chen, R. F.; Zhang, H. B.; Lu, Z. W.; Xu, X. X.; Duan, L. M.; Yang, H. R.; Huang, W.
4002:
Zhang, M. M.; Tian, Y. L.; Wang, Y. S.; Zhang, Z. Y.; Gan, Z. G.; Yang, H. B.; Huang, M. H.; Ma, L.; Yang, C. L.; Wang, J. G.; Yuan, C. X.; Qi, C.; Andreyev, A. N.; Huang, X. Y.; Xu, S. Y.; Zhao, Z.; Chen, L. X.; Wang, J. Y.; Liu, M. L.; Qiang, Y. H.; Li, G. S.; Yang, W. Q.; Chen, R. F.; Zhang, H.
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About 99.284% of natural uranium is uranium-238, which has a half-life of 1.41×10 seconds (4.468×10 years). Depleted uranium has an even higher concentration of U, and even low-enriched uranium (LEU) is still mostly U. Reprocessed uranium is also mainly U, with about as much uranium-235 as natural
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as part of the thorium fuel cycle. U was investigated for use in nuclear weapons and as a reactor fuel. It was occasionally tested but never deployed in nuclear weapons and has not been used commercially as a nuclear fuel. It has been used successfully in experimental nuclear reactors and has been
4150:
Kromer, Kathrin; Lyu, Chunhai; Bieroń, Jacek; Door, Menno; Enzmann, Lucia; Filianin, Pavel; Gaigalas, Gediminas; Harman, Zoltán; Herkenhoff, Jost; Huang, Wenjia; Keitel, Christoph H.; Eliseev, Sergey; Blaum, Klaus (2024-02-06). "Atomic mass determination of uranium-238".
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below the range where fast fission of one or more next-generation nuclei is probable. Doppler broadening of U's neutron absorption resonances, increasing absorption as fuel temperature increases, is also an essential negative feedback mechanism for reactor control.
4046:
Gan, ZaiGuo; Jiang, Jian; Yang, HuaBin; Zhang, ZhiYuan; Ma, Long; Yu, Lin; Wang, JianGuo; Tian, YuLin; Ding, Bing; Huang, TianHeng; Wang, YongSheng; Guo, Song; Sun, MingDao; Wang, KaiLong; Zhou, ShanGui; Ren, ZhongZhou; Zhou, XiaoHong; Xu, HuShan (1 August 2016).
3348:. Protactinium-233 has a half-life of 27 days and beta decays into uranium-233; some proposed molten salt reactor designs attempt to physically isolate the protactinium from further neutron capture before beta decay can occur. 3500:—the average over neutrons having various intermediate energies. In a nuclear reactor, non-fissile isotopes capture a neutron breeding fissile isotopes. U is converted to U more easily and therefore at a greater rate than 3852:
Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04).
4882:
Niwase, T.; Watanabe, Y. X.; Hirayama, Y.; Mukai, M.; Schury, P.; Andreyev, A. N.; Hashimoto, T.; Iimura, S.; Ishiyama, H.; Ito, Y.; Jeong, S. C.; Kaji, D.; Kimura, S.; Miyatake, H.; Morimoto, K. (2023-03-31).
3722:, with a total decay energy of about 1.29 MeV. The most common gamma decay at 74.660 keV accounts for the difference in the two major channels of beta emission energy, at 1.28 and 1.21 MeV. 3465:, which concentrates lighter isotopes even more strongly than it does U. The increased percentage of U in enriched natural uranium is acceptable in current nuclear reactors, but (re-enriched) 557:(historically called actino-uranium) has 15 members and ends in lead-207. The constant rates of decay in these series makes comparison of the ratios of parent-to-daughter elements useful in 2666: 2405:# – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS). 4885:"Discovery of New Isotope $ ^{241}\mathrm{U}$ and Systematic High-Precision Atomic Mass Measurements of Neutron-Rich Pa-Pu Nuclei Produced via Multinucleon Transfer Reactions" 3838: 3260:
Uranium-214 is the lightest known isotope of uranium. It was discovered at the Spectrometer for Heavy Atoms and Nuclear Structure (SHANS) at the Heavy Ion Research Facility in
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has a half-life of about 23 million years; and is neither fissile with thermal neutrons, nor very good fertile material, but is generally considered a nuisance and long-lived
428: 4948: 4250: 491:. In addition to isotopes found in nature or nuclear reactors, many isotopes with far shorter half-lives have been produced, ranging from U to U (except for U). The 4558: 3636:
in 1940, who in a near-miss discovery, inferred the creation of element 93, but was unable to isolate the then-unknown element or measure its decay properties.
4198:"Discovery of New Isotope U and Systematic High-Precision Atomic Mass Measurements of Neutron-Rich Pa-Pu Nuclei Produced via Multinucleon Transfer Reactions" 2659: 2495:# – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN). 4087:
Trenn, Thaddeus J. (1978). "Thoruranium (U-236) as the extinct natural parent of thorium: The premature falsification of an essentially correct theory".
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it is on the order of 1 barn. At thermal energy levels, about 5 of 6 neutron absorptions result in fission and 1 of 6 result in neutron capture forming
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Plus radium (element 88). While actually a sub-actinide, it immediately precedes actinium (89) and follows a three-element gap of instability after
3236: 4532: 3910:
Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references*".
2652: 421: 7842: 7811: 4941: 4722: 3302:(a daughter of U, produced relatively quickly) makes U contaminated with it more difficult to handle. Uranium-232 is a rare example of an 4349:
Milsted, J.; Friedman, A. M.; Stevens, C. M. (1965). "The alpha half-life of berkelium-247; a new long-lived isomer of berkelium-248".
4714: 4402:" nuclides with half-lives significantly in excess of Th; e.g., while Cd has a half-life of only fourteen years, that of Cd is eight 4674: 414: 4934: 4118: 4403: 7832: 7806: 3678:. Uranium-238 is fissionable by fast neutrons, but cannot support a chain reaction because inelastic scattering reduces 2870: 2831: 2798: 2771: 7801: 4554: 4701: 2532: 2517: 3303: 3162: 3131: 3108: 3086: 3055: 4746:
B. C. Diven; J. Terrell; A. Hemmendinger (1 January 1958). "Capture-to-Fission Ratios for Fast Neutrons in U235".
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uranium, a comparable proportion of uranium-236, and much smaller amounts of other isotopes of uranium such as
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in an experiment involving U+Pt multinucleon transfer reactions. Its half-life is about 40 minutes.
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contains more U than natural uranium as a byproduct of the uranium enrichment process aimed at obtaining
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U occurs in natural uranium as an indirect decay product of uranium-238, but makes up only 55 parts per
3291: 2707: 4783:"The discoveries of uranium 237 and symmetric fission — From the archival papers of Nishina and Kimura" 4510: 4439: 4314:(84) where no nuclides have half-lives of at least four years (the longest-lived nuclide in the gap is 3810:
Proceedings of the conference on nuclear data evaluation methods and procedures. BNL-NCS 51363, vol. II
4599: 4197: 7765: 7761: 7492: 7488: 7310: 7306: 7289: 7285: 6988: 6984: 6729: 6725: 6678: 6674: 6657: 6653: 6594: 6590: 6531: 6527: 6447: 6443: 6426: 6422: 6384: 6380: 6242: 6238: 5946: 5942: 5874: 5870: 5664: 5660: 5643: 5639: 5622: 5618: 5601: 5597: 5506: 5502: 5327: 5323: 5285: 5281: 5146: 5142: 4986: 4755: 4636: 4461: 4358: 3957: 3854: 7723: 7719: 7513: 7509: 7436: 7432: 7394: 7390: 7352: 7348: 6883: 6879: 6862: 6858: 6820: 6816: 6636: 6632: 6573: 6569: 6510: 6506: 6468: 6464: 6405: 6401: 6335: 6331: 6179: 6175: 6116: 6112: 6032: 6028: 5990: 5986: 5916: 5912: 5895: 5891: 5853: 5849: 5811: 5807: 5578: 5574: 5443: 5439: 5199: 5195: 3466: 3425: 2442: 1721: 1428: 130: 3808: 7639: 7635: 7415: 7411: 7205: 7201: 6750: 6746: 6489: 6485: 6356: 6352: 6284: 6280: 6200: 6196: 6158: 6154: 5769: 5765: 5748: 5744: 5727: 5723: 5485: 5481: 5378: 5374: 5306: 5302: 5264: 5260: 5169: 5165: 4912: 4485: 4451: 4399: 4386: 4228: 4160: 4028: 3981: 3947: 3550: 3497: 3443:, or engineering for isolating U. Very small pure samples of U can be extracted via the chemical 3432: 558: 457: 146: 3351:
Uranium-233 usually fissions on neutron absorption but sometimes retains the neutron, becoming
7796: 7790: 6699: 6695: 6580: 6305: 6301: 5527: 5523: 5243: 5239: 4904: 4812: 4728: 4718: 4680: 4670: 4477: 4260: 4220: 4178: 4020: 3973: 3870: 3711: 3606: 2106: 688: 515: 88: 68: 59: 7837: 7111: 6717: 6615: 6611: 6552: 6548: 6323: 5934: 5790: 5786: 5706: 5702: 5545: 5366: 5348: 5344: 5187: 5134: 5039: 5034: 5029: 4961: 4896: 4802: 4794: 4763: 4644: 4469: 4366: 4322:). Radium's longest lived isotope, at 1,600 years, thus merits the element's inclusion here. 4212: 4170: 4096: 4060: 4012: 3965: 3919: 3862: 3789: 3663: 3493: 3458: 3410: 3345: 2722: 2432: 2016: 1345: 682: 601: 535: 473: 3329:
proposed for much wider use as a nuclear fuel. It has a half-life of around 160,000 years.
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of 245,500 years is only about 1/18,000 that of U. The path of production of U is this: U
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Uranium-233 is produced by neutron irradiation of thorium-232. When thorium-232 absorbs a
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in 2021, produced by firing argon-36 at tungsten-182. It alpha-decays with a half-life of
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might contain even higher fractions of U, which is undesirable. This is because U is not
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Extraction of rather small amounts of U from natural uranium would be feasible using
3368: 3364: 3360: 3287: 2613: 2596: 2544: 2505: 2483:( ) spin value – Indicates spin with weak assignment arguments. 2422: 1534: 1439: 669: 647: 628: 605: 597: 542: 477: 345: 93: 4926: 3530:
Uranium-235 makes up about 0.72% of natural uranium. Unlike the predominant isotope
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because it is the only isotope existing in nature to any appreciable extent that is
7541: 7233: 6932: 5049: 4981: 4900: 4473: 4216: 4133: 3969: 3610: 3444: 3299: 2560: 523: 3355:. The capture-to-fission ratio is smaller than the other two major fissile fuels, 4385:
This is the heaviest nuclide with a half-life of at least four years before the "
4174: 7751: 7709: 7688: 7058: 6974: 6953: 5044: 4016: 3696: 3692: 3688: 3671: 3645: 3597: 3585: 3577: 3531: 3525: 3501: 3489: 3462: 3421: 3417: 3398: 3394: 3380: 3356: 3352: 3337: 3325: 3319: 3281: 2703: 2683: 2060: 1871: 1738: 1632: 1569: 1500: 735: 642: 562: 519: 484: 480: 465: 461: 449: 321: 299: 282: 260: 243: 221: 204: 182: 165: 141: 122: 116: 100: 17: 3923: 3793: 7380: 7338: 7275: 7151: 7130: 7079: 6911: 6848: 6785: 6081: 6060: 5471: 4100: 3715: 3629: 3406: 3341: 2396:) is given in concise form in parentheses after the corresponding last digits. 661: 469: 4732: 4264: 4182: 4024: 3874: 7667: 7625: 7604: 7583: 7464: 7254: 7191: 7100: 7037: 7016: 6270: 6144: 6102: 6018: 5974: 5839: 5692: 5564: 5429: 5406: 5227: 5069: 5059: 5054: 4787:
Proceedings of the Japan Academy. Series B, Physical and Biological Sciences
4767: 4315: 4255: 3557: 3436: 3435:, similar to normal uranium-enrichment. However, there is no real demand in 3402: 3390: 2688: 655: 73: 4908: 4816: 4481: 4224: 3977: 4065: 3866: 7772: 7499: 7317: 7296: 6995: 6736: 6685: 6664: 6601: 6538: 6454: 6433: 6391: 6249: 5953: 5881: 5671: 5650: 5629: 5608: 5513: 5334: 5292: 5153: 4311: 4290: 4251:"In pursuit of a 'magic number', physicists discover new uranium isotope" 3581: 3474: 2679: 550: 4798: 604:: it absorbs neutrons to produce a radioactive isotope that decays into 526:), and the most abundant and stable is uranium-238, with a half-life of 7730: 7562: 7520: 7443: 7401: 7359: 6890: 6869: 6827: 6643: 6517: 6475: 6412: 6342: 6186: 6123: 6039: 5997: 5923: 5902: 5860: 5818: 5585: 5450: 5206: 5064: 4957: 3855:"Standard atomic weights of the elements 2021 (IUPAC Technical Report)" 3667: 3659: 3655: 3651: 3535: 3470: 3440: 3386: 3333: 3307: 3286:
Uranium-232 has a half-life of 68.9 years and is a side product in the
3261: 3230: 566: 511: 441: 36: 32: 518:), U (0.7198–0.7202%), and U (0.0050–0.0059%). All three isotopes are 7646: 7422: 7212: 6757: 6496: 6363: 6291: 6207: 6165: 5776: 5755: 5734: 5492: 5385: 5313: 5271: 5176: 3743:, a group of researchers based in Korea reported that they had found 4049:"α decay studies of the neutron-deficient uranium isotopes 215-217U" 3834: 4620:
Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S. (2017).
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Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021).
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in a nuclear reactor. U has a half-life of about 23.45 minutes and
600:) mass of uranium-235. Uranium-238 is also important because it is 6706: 6312: 5534: 5250: 4533:"Physicists have created a new and extremely rare kind of uranium" 3265: 27:
Nuclides with atomic number of 92 but with different mass numbers
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as daughter – Daughter product is nearly stable.
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Niwase, T.; Watanabe, Y. X.; Hirayama, Y.; et al. (2023).
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Np then, with a half-life of about 2.356 days, beta-decays to
4600:"Uses For Uranium-233: What Should Be Kept for Future Needs?" 3613:
and in the reprocessed uranium made from spent nuclear fuel.
3588:. The fission-to-capture ratio improves for faster neutrons. 3246:(thermal neutron capture cross section greater than 3k barns) 3816:. Upton, NY (USA): Brookhaven National Lab. pp. 835 ff 3424:, except for the small percentage of nuclei that undergo 2624:
Neutron capture product; parent of trace quantities of Pu
2474:
as daughter – Daughter product is stable.
3340:, which has a half-life of only 22 minutes. Thorium-233 4119:"Cluster radioactivity: an overview after twenty years" 2612:
Neutron capture product, parent of trace quantities of
4417:"Physicists Discover New Uranium Isotope: Uranium-214" 3451:
that have aged somewhat to allow some decay to U via
3624:has a half-life of about 6.75 days. It decays into 3324:Uranium-233 is a fissile isotope that is bred from 371: 355: 4859:"Previously unknown isotope of uranium discovered" 4286:"Previously unknown isotope of uranium discovered" 4622:"The NUBASE2016 evaluation of nuclear properties" 3775:"The NUBASE2020 evaluation of nuclear properties" 4852: 4850: 3512:), because U has a much smaller neutron-capture 3208: 3203: 3196: 3175: 3168: 3156: 3147: 3027: 3022: 3008: 3092: 3078: 3071: 3064: 3059: 3047: 3042: 3037: 592:has a high probability of inducing fission. A 4942: 3140: 3135: 3121: 3112: 2990: 2985: 2973: 2968: 2963: 2958: 2948: 2943: 2929: 2922: 2898: 2893: 2884: 2879: 2874: 2864: 2859: 2852: 2845: 2840: 2835: 2825: 2820: 2815: 2810: 2660: 422: 8: 3768: 3766: 3764: 3762: 3760: 3650:Uranium-238 (U or U-238) is the most common 3553:or found in significant quantity in nature. 3363:; it is also lower than that of short-lived 2648:Actinides and fission products by half-life 30: 3997: 3995: 3807:Magurno, B.A.; Pearlstein, S, eds. (1981). 2915:in the range of 100 a–210 ka ... 2786: 2777: 2759: 4949: 4935: 4927: 4660: 4658: 4598:C. W. Forsburg; L. C. Lewis (1999-09-24). 4335:fission of uranium-235, e.g. in a typical 3632:. It was discovered by Japanese physicist 3367:, but bested by very difficult-to-produce 2667: 2653: 2392:( ) – Uncertainty (1 2359: 429: 415: 4806: 4455: 4164: 4064: 3951: 472:and are found in appreciable quantity in 4511:"Lightest-known form of uranium created" 3237:naturally occurring radioactive material 3226:cross section in the range of 8–50 barns 615: 52: 4244: 4242: 3756: 2372: 510:Natural uranium consists of three main 4696: 4694: 4159:(2). American Physical Society (APS). 4117:Bonetti, R.; Guglielmetti, A. (2007). 3290:. It has been cited as an obstacle to 2491: 2489: 596:can be sustained with a large enough ( 483:is also found. Other isotopes such as 29: 7555: 4842:CRC Handbook of Chemistry and Physics 4830:CRC Handbook of Chemistry and Physics 4561:from the original on 26 February 2019 4112: 4110: 3710:is usually produced by exposing U to 3310:with both thermal and fast neutrons. 3189: 2908: 2570: 2568: 2555: 2553: 2527: 2525: 2218: 2121: 1969: 969: 306: 303: 267: 264: 228: 225: 189: 186: 150: 145: 109: 104: 7: 4318:with a half life of less than four 4715:International Atomic Energy Agency 4438:Zhang, Z. Y.; et al. (2021). 3835:"Standard Atomic Weights: Uranium" 572:Uranium-235 is important for both 25: 4249:Mukunth, Vasudevan (2023-04-05). 3737:In 2023, in a paper published in 3054: 545:, decaying through the 18-member 7479: 7171: 7110: 6765: 6716: 6371: 6322: 5933: 5544: 5365: 5186: 5133: 4609:. Oak Ridge National Laboratory. 3413:. Finally, Pa beta decays to U. 2633:Intermediate decay product of Pu 3564:. It was discovered in 1935 by 2353:This table header & footer: 452:element (radioelement) with no 4901:10.1103/PhysRevLett.130.132502 4781:Ikeda, Nagao (July 25, 2011). 4667:High converting water reactors 4474:10.1103/PhysRevLett.126.152502 4217:10.1103/PhysRevLett.130.132502 3970:10.1103/PhysRevLett.126.152502 3496:, and about 700 barns for its 2595:Intermediate decay product of 2504:Intermediate decay product of 1: 4649:10.1088/1674-1137/41/3/030001 3294:using U, because the intense 2640:Actinides vs fission products 2586:Important in nuclear reactors 7843:Lists of isotopes by element 4371:10.1016/0029-5582(65)90719-4 4284:Yirka, Bob (April 5, 2023). 4175:10.1103/physrevc.109.l021301 3191:... nor beyond 15.7 Ma 2379:U – Excited 448:U) is a naturally occurring 4419:. Sci-News.com. 14 May 2021 4126:Romanian Reports in Physics 4017:10.1103/PhysRevC.106.024305 3658:found in nature. It is not 3488:cross section of about 100 3473:, and tends to absorb slow 3389:of the uranium because its 2910:No fission products have a 2643: 561:. Uranium-233 is made from 555:decay series of uranium-235 7859: 7160: 5413: 5234: 5160: 4703:Use of Reprocessed Uranium 4669:. CRC Press. p. 212. 4513:. Live Science. 3 May 2021 3859:Pure and Applied Chemistry 3643: 3595: 3523: 3378: 3317: 3279: 2350: 7786: 7476: 4968: 4211:(13): 132502-1–132502-6. 4132:: 301–310. Archived from 4101:10.1080/00033797800200441 3538:, i.e., it can sustain a 3447:process, from samples of 3218: 2698: 2687: 2678: 2646: 2276: 2273: 2270: 2261: 2258: 2255: 2252: 2250: 2247: 2235: 2233: 2230: 2221: 2216: 2213: 2192: 2142: 2140: 2137: 2124: 2119: 2116: 2090: 2088: 2085: 2076: 2073: 2070: 2067: 2064: 2059: 2038: 1986: 1984: 1981: 1972: 1967: 1964: 1943: 1906: 1903: 1900: 1887: 1884: 1881: 1878: 1875: 1870: 1850: 1820: 1770: 1768: 1765: 1756: 1753: 1750: 1747: 1742: 1737: 1714: 1662: 1660: 1657: 1648: 1645: 1642: 1639: 1636: 1631: 1599: 1596: 1593: 1584: 1581: 1578: 1575: 1573: 1568: 1529: 1527: 1524: 1515: 1512: 1509: 1506: 1504: 1499: 1487: 1485: 1482: 1473: 1470: 1467: 1464: 1462: 1459: 1423: 1421: 1418: 1409: 1406: 1403: 1400: 1398: 1395: 1383: 1381: 1378: 1369: 1366: 1363: 1360: 1358: 1355: 1340: 1338: 1335: 1326: 1323: 1320: 1317: 1315: 1312: 1300: 1298: 1295: 1286: 1283: 1280: 1277: 1275: 1272: 1196: 1194: 1191: 1182: 1179: 1176: 1173: 1171: 1168: 1156: 1154: 1151: 1142: 1139: 1136: 1133: 1131: 1128: 1116: 1114: 1111: 1102: 1099: 1096: 1093: 1091: 1088: 1076: 1074: 1071: 1062: 1059: 1056: 1053: 1051: 1048: 1036: 1034: 1031: 1022: 1019: 1016: 1013: 1011: 1008: 996: 994: 991: 972: 967: 964: 910: 908: 905: 886: 883: 880: 877: 875: 872: 841: 779: 777: 774: 765: 762: 759: 756: 754: 751: 697: 687: 676: 668: 660: 654: 641: 634: 627: 622: 618: 608:, which also is fissile. 410: 298: 259: 220: 181: 140: 99: 58: 55: 51: 4053:Chinese Science Bulletin 3924:10.1088/1674-1137/abddaf 3794:10.1088/1674-1137/abddae 3666:: it can capture a slow 3568:. Its (fission) nuclear 576:(energy production) and 5122:Chal­co­gens 4889:Physical Review Letters 4768:10.1103/PhysRev.109.144 4748:Physical Review Letters 4665:Ronen, Y., ed. (1990). 4581:"INCIDENT NEUTRON DATA" 4444:Physical Review Letters 4205:Physical Review Letters 3940:Physical Review Letters 3740:Physical Review Letters 3609:. It is found in spent 3566:Arthur Jeffrey Dempster 4857:Yirka, Bob; Phys.org. 2533:uranium–uranium dating 2518:uranium–thorium dating 2193:133.7991(10) keV 1821:0.076737(18) keV 1715:1421.257(17) keV 514:, U (99.2739–99.2752% 493:standard atomic weight 487:have been produced in 357:Standard atomic weight 4139:on 19 September 2016. 4066:10.1360/N972015-01316 3867:10.1515/pac-2019-0603 3401:. Next, with a short 3292:nuclear proliferation 3235:№,  primarily a 3222:₡,  has thermal 3891:. GlobalSecurity.org 2219:2500(900)# keV 692:(mole fraction) 7833:Isotopes of uranium 7812:Isotopes by element 7807:Metastable isotopes 4844:, 57th Ed. p. B-423 4832:, 57th Ed. p. B-345 4799:10.2183/pjab.87.371 4760:1958PhRv..109..144D 4641:2017ChPhC..41c0001A 4466:2021PhRvL.126o2502Z 4363:1965NucPh..71..299M 3962:2021PhRvL.126o2502Z 3516:of just 2.7 barns. 3467:reprocessed uranium 3426:spontaneous fission 2599:, also produced by 2576:Uranium–lead dating 2459:Bold italics symbol 2443:Spontaneous fission 2122:2557.9(5) keV 2039:274.0(10) keV 1944:1052.5(6) keV 1851:2500(300) keV 704:Range of variation 458:primordial isotopes 48: 7802:Tables of nuclides 4711:Technical Document 4400:classically stable 4387:sea of instability 4331:Specifically from 3889:"Uranium Isotopes" 3556:Uranium-235 has a 3551:primordial nuclide 3498:resonance integral 3433:isotope separation 2799:> 9 a 2074:238.050787618(15) 701:Normal proportion 698:Excitation energy 559:radiometric dating 541:Uranium-238 is an 7820: 7819: 7791:Table of nuclides 7781: 7780: 7768: 7747: 7726: 7705: 7684: 7663: 7642: 7621: 7600: 7579: 7558: 7537: 7516: 7495: 7460: 7439: 7418: 7397: 7376: 7355: 7334: 7313: 7292: 7271: 7250: 7229: 7208: 7187: 7147: 7126: 7096: 7075: 7054: 7033: 7012: 6991: 6970: 6949: 6928: 6907: 6886: 6865: 6844: 6823: 6802: 6781: 6753: 6732: 6702: 6681: 6660: 6639: 6618: 6597: 6576: 6555: 6534: 6513: 6492: 6471: 6450: 6429: 6408: 6387: 6359: 6338: 6308: 6287: 6266: 6245: 6224: 6203: 6182: 6161: 6140: 6119: 6098: 6077: 6056: 6035: 6014: 5993: 5970: 5949: 5919: 5898: 5877: 5856: 5835: 5814: 5793: 5772: 5751: 5730: 5709: 5688: 5667: 5646: 5625: 5604: 5581: 5560: 5530: 5509: 5488: 5467: 5446: 5425: 5402: 5381: 5351: 5330: 5309: 5288: 5267: 5246: 5223: 5202: 5172: 5149: 5119:Pnicto­gens 5080: 4978: 4962:chemical elements 4724:978-92-0-157109-0 4629:Chinese Physics C 4557:. Nuclear Power. 4398:Excluding those " 4153:Physical Review C 4089:Annals of Science 4059:(22): 2502–2511. 4005:Physical Review C 3912:Chinese Physics C 3782:Chinese Physics C 3712:neutron radiation 3607:radioactive waste 3545:. It is the only 3304:even-even isotope 3253: 3252: 3214:0.7–14.1 Ga 3210: 3205: 3198: 3177: 3170: 3158: 3149: 3142: 3137: 3123: 3114: 3094: 3080: 3073: 3066: 3061: 3049: 3044: 3039: 3029: 3024: 3010: 2992: 2987: 2975: 2970: 2965: 2960: 2950: 2945: 2931: 2924: 2900: 2895: 2886: 2881: 2876: 2866: 2861: 2854: 2847: 2842: 2837: 2827: 2822: 2817: 2812: 2788: 2779: 2761: 2448: 2447: 2370: 2369: 1970:2750(3) keV 689:Natural abundance 516:natural abundance 468:, that have long 439: 438: 351: 350: 16:(Redirected from 7850: 7766:§ List 7760: 7745:§ List 7739: 7724:§ List 7718: 7703:§ List 7697: 7682:§ List 7676: 7661:§ List 7655: 7640:§ List 7634: 7619:§ List 7613: 7598:§ List 7592: 7577:§ List 7571: 7556:§ List 7550: 7535:§ List 7529: 7514:§ List 7508: 7493:§ List 7487: 7483: 7482: 7458:§ List 7452: 7437:§ List 7431: 7416:§ List 7410: 7395:§ List 7389: 7374:§ List 7368: 7353:§ List 7347: 7332:§ List 7326: 7311:§ List 7305: 7290:§ List 7284: 7269:§ List 7263: 7248:§ List 7242: 7227:§ List 7221: 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6054:§ List 6048: 6033:§ List 6027: 6012:§ List 6006: 5991:§ List 5985: 5968:§ List 5962: 5947:§ List 5941: 5937: 5917:§ List 5911: 5896:§ List 5890: 5875:§ List 5869: 5854:§ List 5848: 5833:§ List 5827: 5812:§ List 5806: 5791:§ List 5785: 5770:§ List 5764: 5749:§ List 5743: 5728:§ List 5722: 5707:§ List 5701: 5686:§ List 5680: 5665:§ List 5659: 5644:§ List 5638: 5623:§ List 5617: 5602:§ List 5596: 5579:§ List 5573: 5558:§ List 5552: 5548: 5528:§ List 5522: 5507:§ List 5501: 5486:§ List 5480: 5465:§ List 5459: 5444:§ List 5438: 5423:§ List 5417: 5400:§ List 5394: 5379:§ List 5373: 5369: 5349:§ List 5343: 5328:§ List 5322: 5307:§ List 5301: 5286:§ List 5280: 5265:§ List 5259: 5244:§ List 5238: 5221:§ List 5215: 5200:§ List 5194: 5190: 5170:§ List 5164: 5147:§ List 5141: 5137: 5076: 4974: 4971: 4970: 4951: 4944: 4937: 4928: 4921: 4920: 4879: 4873: 4872: 4870: 4869: 4854: 4845: 4839: 4833: 4827: 4821: 4820: 4810: 4778: 4772: 4771: 4743: 4737: 4736: 4708: 4698: 4689: 4688: 4662: 4653: 4652: 4626: 4617: 4611: 4610: 4604: 4595: 4589: 4588: 4585:atom.kaeri.re.kr 4577: 4571: 4570: 4568: 4566: 4551: 4545: 4544: 4542: 4540: 4529: 4523: 4522: 4520: 4518: 4507: 4501: 4500: 4498: 4496: 4459: 4435: 4429: 4428: 4426: 4424: 4413: 4407: 4396: 4390: 4383: 4377: 4374: 4346: 4340: 4329: 4323: 4308: 4302: 4301: 4299: 4298: 4281: 4275: 4274: 4272: 4271: 4246: 4237: 4236: 4202: 4193: 4187: 4186: 4168: 4147: 4141: 4140: 4138: 4123: 4114: 4105: 4104: 4084: 4078: 4077: 4075: 4073: 4068: 4043: 4037: 4036: 3999: 3990: 3989: 3955: 3934: 3928: 3927: 3907: 3901: 3900: 3898: 3896: 3885: 3879: 3878: 3849: 3843: 3842: 3831: 3825: 3824: 3822: 3821: 3815: 3804: 3798: 3797: 3779: 3770: 3576:is about 504.81 3494:thermal neutrons 3459:Enriched uranium 3411:protactinium-234 3346:protactinium-233 3271: 3209: 3204: 3197: 3176: 3169: 3157: 3148: 3141: 3136: 3132:1.61–6.5 Ma 3122: 3113: 3093: 3079: 3072: 3065: 3060: 3048: 3043: 3038: 3028: 3023: 3009: 2998:8.3–8.5 ka 2991: 2986: 2979:4.7–7.4 ka 2974: 2969: 2964: 2959: 2954:1.3–1.6 ka 2949: 2944: 2930: 2923: 2913: 2899: 2894: 2885: 2880: 2875: 2865: 2860: 2853: 2846: 2841: 2836: 2826: 2821: 2816: 2811: 2787: 2778: 2760: 2700:Fission products 2669: 2662: 2655: 2644: 2634: 2631: 2625: 2622: 2616: 2610: 2604: 2593: 2587: 2584: 2578: 2572: 2563: 2557: 2548: 2541: 2535: 2529: 2520: 2514: 2508: 2502: 2496: 2493: 2484: 2481: 2475: 2469: 2463: 2455: 2449: 2433:Electron capture 2416: 2415: 2414:Modes of decay: 2412: 2406: 2403: 2397: 2390: 2384: 2377: 2366: 2361: 2259:240.0565924(27) 2169:23.45(0.02) min 2166:239.0542920(16) 2010:237.0487283(13) 1885:236.0455661(12) 1754:235.0439281(12) 1646:234.0409503(12) 1582:233.0396343(24) 1513:232.0371548(19) 1471:231.0362922(29) 1407:230.0339401(48) 1367:229.0335060(64) 1284:227.0311811(91) 983: 981: 980: 947: 945: 944: 897: 895: 894: 884:217.024660(86)# 855: 853: 852: 819: 817: 816: 732: 730: 729: 693: 651: 616: 612:List of isotopes 588:, i.e., thermal 586:thermal neutrons 574:nuclear reactors 536:age of the Earth 533: 531: 522:(i.e., they are 506: 504: 489:breeder reactors 431: 424: 417: 398: 396: 389: 388: 384: 381: 367: 342: 330: 318: 313: 311: 291: 279: 274: 272: 252: 240: 235: 233: 213: 201: 196: 194: 174: 162: 157: 155: 133: 119: 112: 85: 53: 49: 47: 46: 21: 18:Uranium isotopes 7858: 7857: 7853: 7852: 7851: 7849: 7848: 7847: 7823: 7822: 7821: 7816: 7782: 7776: 7769: 7755: 7748: 7734: 7727: 7713: 7706: 7692: 7685: 7671: 7664: 7650: 7643: 7629: 7622: 7608: 7601: 7587: 7580: 7566: 7559: 7545: 7538: 7524: 7517: 7503: 7496: 7480: 7468: 7461: 7447: 7440: 7426: 7419: 7405: 7398: 7384: 7377: 7363: 7356: 7342: 7335: 7321: 7314: 7300: 7293: 7279: 7272: 7258: 7251: 7237: 7230: 7216: 7209: 7195: 7188: 7172: 7155: 7148: 7134: 7127: 7104: 7097: 7083: 7076: 7062: 7055: 7041: 7034: 7020: 7013: 6999: 6992: 6978: 6971: 6957: 6950: 6936: 6929: 6915: 6908: 6894: 6887: 6873: 6866: 6852: 6845: 6831: 6824: 6810: 6803: 6789: 6782: 6766: 6761: 6754: 6740: 6733: 6710: 6703: 6689: 6682: 6668: 6661: 6647: 6640: 6626: 6619: 6605: 6598: 6584: 6577: 6563: 6556: 6542: 6535: 6521: 6514: 6500: 6493: 6479: 6472: 6458: 6451: 6437: 6430: 6416: 6409: 6395: 6388: 6372: 6367: 6360: 6346: 6339: 6316: 6309: 6295: 6288: 6274: 6267: 6253: 6246: 6232: 6225: 6211: 6204: 6190: 6183: 6169: 6162: 6148: 6141: 6127: 6120: 6106: 6099: 6085: 6078: 6064: 6057: 6043: 6036: 6022: 6015: 6001: 5994: 5978: 5971: 5957: 5950: 5927: 5920: 5906: 5899: 5885: 5878: 5864: 5857: 5843: 5836: 5822: 5815: 5801: 5794: 5780: 5773: 5759: 5752: 5738: 5731: 5717: 5710: 5696: 5689: 5675: 5668: 5654: 5647: 5633: 5626: 5612: 5605: 5589: 5582: 5568: 5561: 5538: 5531: 5517: 5510: 5496: 5489: 5475: 5468: 5454: 5447: 5433: 5426: 5410: 5403: 5389: 5382: 5359: 5352: 5338: 5331: 5317: 5310: 5296: 5289: 5275: 5268: 5254: 5247: 5231: 5224: 5210: 5203: 5180: 5173: 5157: 5150: 5125:Halo­gens 5089: 5084: 4964: 4955: 4925: 4924: 4881: 4880: 4876: 4867: 4865: 4856: 4855: 4848: 4840: 4836: 4828: 4824: 4780: 4779: 4775: 4745: 4744: 4740: 4725: 4706: 4700: 4699: 4692: 4677: 4664: 4663: 4656: 4624: 4619: 4618: 4614: 4602: 4597: 4596: 4592: 4579: 4578: 4574: 4564: 4562: 4553: 4552: 4548: 4538: 4536: 4535:. New Scientist 4531: 4530: 4526: 4516: 4514: 4509: 4508: 4504: 4494: 4492: 4437: 4436: 4432: 4422: 4420: 4415: 4414: 4410: 4397: 4393: 4384: 4380: 4375: 4351:Nuclear Physics 4348: 4347: 4343: 4337:nuclear reactor 4333:thermal neutron 4330: 4326: 4309: 4305: 4296: 4294: 4283: 4282: 4278: 4269: 4267: 4248: 4247: 4240: 4200: 4195: 4194: 4190: 4149: 4148: 4144: 4136: 4121: 4116: 4115: 4108: 4086: 4085: 4081: 4071: 4069: 4045: 4044: 4040: 4001: 4000: 3993: 3936: 3935: 3931: 3909: 3908: 3904: 3894: 3892: 3887: 3886: 3882: 3851: 3850: 3846: 3833: 3832: 3828: 3819: 3817: 3813: 3806: 3805: 3801: 3777: 3772: 3771: 3758: 3753: 3735: 3705: 3674:become fissile 3648: 3642: 3619: 3600: 3594: 3574:thermal neutron 3547:fissile isotope 3528: 3522: 3486:neutron capture 3479:nuclear reactor 3383: 3377: 3322: 3316: 3296:gamma radiation 3284: 3278: 3269: 3258: 3249: 3224:neutron capture 3087:327–375 ka 3056:150–250 ka 2935:430–900 a 2914: 2911: 2906:141–351 a 2691: 2674: 2673: 2642: 2637: 2632: 2628: 2623: 2619: 2611: 2607: 2601:neutron capture 2594: 2590: 2585: 2581: 2573: 2566: 2558: 2551: 2542: 2538: 2530: 2523: 2515: 2511: 2503: 2499: 2494: 2487: 2482: 2478: 2470: 2466: 2456: 2452: 2413: 2409: 2404: 2400: 2391: 2387: 2378: 2374: 2365: 2351: 2092: 1933: 1923: 1810: 1800: 1790: 1772: 1745:Actino-Uranium 1744: 1704: 1694: 1682: 1664: 1626: 1608: 1563: 1543: 1450: 1324:228.031369(14) 1252:226.029339(12) 1220:225.029385(11) 1180:224.027636(16) 1140:223.027961(63) 1100:222.026058(56) 1060:221.026323(77) 1020:219.025009(14) 978: 976: 975: 973: 942: 940: 939: 937: 934:218.023505(15) 892: 890: 889: 887: 850: 848: 847: 845: 814: 812: 811: 809: 806:216.024760(30) 763:215.026720(11) 727: 725: 724: 722: 691: 685: 681: 674: 671: 666: 663: 658: 652: 645: 624: 620: 614: 590:neutron capture 584:in response to 578:nuclear weapons 529: 527: 502: 500: 497:natural uranium 454:stable isotopes 447: 435: 406: 394: 392: 386: 382: 379: 377: 365: 359: 338: 328: 316: 309: 307: 289: 277: 270: 268: 250: 238: 231: 229: 211: 199: 192: 190: 172: 160: 153: 151: 129: 115: 110: 83: 76: 69:abun­dance 44: 40: 31: 28: 23: 22: 15: 12: 11: 5: 7856: 7854: 7846: 7845: 7840: 7835: 7825: 7824: 7818: 7817: 7815: 7814: 7809: 7804: 7799: 7793: 7787: 7784: 7783: 7779: 7778: 7770: 7759: 7757: 7749: 7738: 7736: 7728: 7717: 7715: 7707: 7696: 7694: 7686: 7675: 7673: 7665: 7654: 7652: 7644: 7633: 7631: 7623: 7612: 7610: 7602: 7591: 7589: 7581: 7570: 7568: 7560: 7549: 7547: 7539: 7528: 7526: 7518: 7507: 7505: 7497: 7486: 7484: 7477: 7474: 7473: 7470: 7462: 7451: 7449: 7441: 7430: 7428: 7420: 7409: 7407: 7399: 7388: 7386: 7378: 7367: 7365: 7357: 7346: 7344: 7336: 7325: 7323: 7315: 7304: 7302: 7294: 7283: 7281: 7273: 7262: 7260: 7252: 7241: 7239: 7231: 7220: 7218: 7210: 7199: 7197: 7189: 7178: 7176: 7169: 7167: 7165: 7162: 7161: 7158: 7157: 7149: 7138: 7136: 7128: 7117: 7115: 7107: 7106: 7098: 7087: 7085: 7077: 7066: 7064: 7056: 7045: 7043: 7035: 7024: 7022: 7014: 7003: 7001: 6993: 6982: 6980: 6972: 6961: 6959: 6951: 6940: 6938: 6930: 6919: 6917: 6909: 6898: 6896: 6888: 6877: 6875: 6867: 6856: 6854: 6846: 6835: 6833: 6825: 6814: 6812: 6804: 6793: 6791: 6783: 6772: 6770: 6763: 6755: 6744: 6742: 6734: 6723: 6721: 6713: 6712: 6704: 6693: 6691: 6683: 6672: 6670: 6662: 6651: 6649: 6641: 6630: 6628: 6620: 6609: 6607: 6599: 6588: 6586: 6578: 6567: 6565: 6557: 6546: 6544: 6536: 6525: 6523: 6515: 6504: 6502: 6494: 6483: 6481: 6473: 6462: 6460: 6452: 6441: 6439: 6431: 6420: 6418: 6410: 6399: 6397: 6389: 6378: 6376: 6369: 6361: 6350: 6348: 6340: 6329: 6327: 6319: 6318: 6310: 6299: 6297: 6289: 6278: 6276: 6268: 6257: 6255: 6247: 6236: 6234: 6226: 6215: 6213: 6205: 6194: 6192: 6184: 6173: 6171: 6163: 6152: 6150: 6142: 6131: 6129: 6121: 6110: 6108: 6100: 6089: 6087: 6079: 6068: 6066: 6058: 6047: 6045: 6037: 6026: 6024: 6016: 6005: 6003: 5995: 5984: 5982: 5980: 5972: 5961: 5959: 5951: 5940: 5938: 5930: 5929: 5921: 5910: 5908: 5900: 5889: 5887: 5879: 5868: 5866: 5858: 5847: 5845: 5837: 5826: 5824: 5816: 5805: 5803: 5795: 5784: 5782: 5774: 5763: 5761: 5753: 5742: 5740: 5732: 5721: 5719: 5711: 5700: 5698: 5690: 5679: 5677: 5669: 5658: 5656: 5648: 5637: 5635: 5627: 5616: 5614: 5606: 5595: 5593: 5591: 5583: 5572: 5570: 5562: 5551: 5549: 5541: 5540: 5532: 5521: 5519: 5511: 5500: 5498: 5490: 5479: 5477: 5469: 5458: 5456: 5448: 5437: 5435: 5427: 5416: 5414: 5412: 5404: 5393: 5391: 5383: 5372: 5370: 5362: 5361: 5353: 5342: 5340: 5332: 5321: 5319: 5311: 5300: 5298: 5290: 5279: 5277: 5269: 5258: 5256: 5248: 5237: 5235: 5233: 5225: 5214: 5212: 5204: 5193: 5191: 5183: 5182: 5174: 5163: 5161: 5159: 5151: 5140: 5138: 5130: 5129: 5126: 5123: 5120: 5117: 5115: 5113: 5111: 5109: 5107: 5105: 5103: 5101: 5099: 5097: 5095: 5093: 5091: 5086: 5085:alkali metals 5081: 5073: 5072: 5067: 5062: 5057: 5052: 5047: 5042: 5037: 5032: 5027: 5022: 5017: 5012: 5007: 5002: 4997: 4992: 4989: 4984: 4979: 4969: 4966: 4965: 4956: 4954: 4953: 4946: 4939: 4931: 4923: 4922: 4895:(13): 132502. 4874: 4846: 4834: 4822: 4793:(7): 371–376. 4773: 4754:(1): 144–150. 4738: 4723: 4690: 4675: 4654: 4612: 4590: 4572: 4546: 4524: 4502: 4450:(15): 152502. 4430: 4408: 4391: 4378: 4341: 4324: 4303: 4276: 4238: 4188: 4142: 4106: 4079: 4038: 3991: 3946:(15): 152502. 3929: 3902: 3880: 3844: 3826: 3799: 3755: 3754: 3752: 3749: 3734: 3731: 3704: 3701: 3680:neutron energy 3670:and after two 3644:Main article: 3641: 3638: 3634:Yoshio Nishina 3618: 3615: 3596:Main article: 3593: 3590: 3543:chain reaction 3524:Main article: 3521: 3518: 3453:alpha emission 3379:Main article: 3376: 3373: 3318:Main article: 3315: 3312: 3280:Main article: 3277: 3274: 3257: 3254: 3251: 3250: 3248: 3247: 3244:neutron poison 3240: 3233: 3227: 3219: 3216: 3215: 3212: 3207: 3202: 3200: 3194: 3193: 3188: 3185: 3183: 3181: 3179: 3173: 3172: 3167: 3165: 3160: 3155: 3153: 3151: 3145: 3144: 3139: 3134: 3129: 3127: 3125: 3120: 3117: 3116: 3111: 3106: 3104: 3102: 3100: 3097: 3096: 3091: 3089: 3084: 3082: 3077: 3075: 3069: 3068: 3063: 3058: 3053: 3051: 3046: 3041: 3035: 3034: 3033:32–76 ka 3031: 3026: 3021: 3019: 3016: 3015: 3012: 3007: 3005: 3003: 3000: 2999: 2996: 2994: 2989: 2984: 2981: 2980: 2977: 2972: 2967: 2962: 2956: 2955: 2952: 2947: 2942: 2940: 2937: 2936: 2933: 2928: 2926: 2921: 2918: 2917: 2907: 2904: 2902: 2897: 2892: 2889: 2888: 2883: 2878: 2873: 2868: 2863: 2858: 2856: 2850: 2849: 2844: 2839: 2834: 2829: 2824: 2819: 2814: 2808: 2807: 2805: 2803: 2801: 2796: 2794: 2792: 2790: 2784: 2783: 2781: 2776: 2774: 2769: 2767: 2765: 2763: 2757: 2756: 2753: 2750: 2747: 2738: 2729: 2720: 2711: 2710: 2697: 2686: 2676: 2675: 2672: 2671: 2664: 2657: 2649: 2647: 2641: 2638: 2636: 2635: 2626: 2617: 2605: 2588: 2579: 2564: 2549: 2536: 2521: 2509: 2497: 2485: 2476: 2464: 2450: 2446: 2445: 2440: 2436: 2435: 2430: 2426: 2425: 2420: 2407: 2398: 2385: 2381:nuclear isomer 2371: 2368: 2367: 2364: 2363: 2355: 2348: 2347: 2345: 2343: 2340: 2337: 2334: 2333:16.8(0.5) min 2331: 2330:242.06296(10) 2328: 2325: 2322: 2320: 2316: 2315: 2313: 2310: 2307: 2304: 2301: 2298: 2295: 2292: 2290: 2286: 2285: 2282: 2278: 2277: 2275: 2272: 2269: 2266: 2263: 2260: 2257: 2254: 2251: 2249: 2245: 2244: 2241: 2237: 2236: 2234: 2232: 2229: 2226: 2223: 2220: 2217: 2215: 2211: 2210: 2208: 2206: 2203: 2200: 2197: 2194: 2191: 2189: 2185: 2184: 2182: 2179: 2176: 2173: 2170: 2167: 2164: 2161: 2158: 2156: 2152: 2151: 2148: 2144: 2143: 2141: 2139: 2136: 2129: 2126: 2123: 2120: 2118: 2114: 2113: 2110: 2103: 2102: 2099: 2098:SF (5.44×10%) 2095: 2094: 2089: 2087: 2084: 2081: 2078: 2077:4.468(3)×10 y 2075: 2072: 2069: 2066: 2063: 2057: 2056: 2054: 2052: 2049: 2046: 2043: 2040: 2037: 2035: 2031: 2030: 2028: 2025: 2022: 2019: 2014: 2011: 2008: 2005: 2002: 2000: 1996: 1995: 1992: 1988: 1987: 1985: 1983: 1980: 1977: 1974: 1971: 1968: 1966: 1962: 1961: 1959: 1957: 1954: 1951: 1948: 1945: 1942: 1940: 1936: 1935: 1930: 1929:CD (≤2.0×10%) 1926: 1925: 1920: 1919:CD (≤2.0×10%) 1916: 1915: 1912: 1908: 1907: 1905: 1902: 1899: 1892: 1889: 1888:2.342(3)×10 y 1886: 1883: 1880: 1877: 1874: 1868: 1867: 1865: 1863: 1861: 1858: 1855: 1852: 1849: 1847: 1843: 1842: 1840: 1838: 1835: 1828: 1825: 1822: 1819: 1817: 1813: 1812: 1807: 1803: 1802: 1797: 1793: 1792: 1787: 1783: 1782: 1779: 1775: 1774: 1769: 1767: 1764: 1761: 1758: 1757:7.038(1)×10 y 1755: 1752: 1749: 1746: 1741: 1735: 1734: 1732: 1730: 1727: 1724: 1719: 1716: 1713: 1711: 1707: 1706: 1701: 1697: 1696: 1689: 1685: 1684: 1679: 1675: 1674: 1671: 1670:SF (1.64×10%) 1667: 1666: 1661: 1659: 1656: 1653: 1650: 1649:2.455(6)×10 y 1647: 1644: 1641: 1638: 1635: 1629: 1628: 1623: 1619: 1618: 1615: 1611: 1610: 1605: 1604:CD (≤7.2×10%) 1601: 1600: 1598: 1595: 1592: 1589: 1586: 1585:1.592(2)×10 y 1583: 1580: 1577: 1574: 1572: 1566: 1565: 1558: 1554: 1553: 1550: 1546: 1545: 1538: 1531: 1530: 1528: 1526: 1523: 1520: 1517: 1514: 1511: 1508: 1505: 1503: 1497: 1496: 1493: 1489: 1488: 1486: 1484: 1481: 1478: 1475: 1472: 1469: 1466: 1463: 1461: 1457: 1456: 1443: 1436: 1435: 1432: 1425: 1424: 1422: 1420: 1417: 1414: 1411: 1410:20.23(0.02) d 1408: 1405: 1402: 1399: 1397: 1393: 1392: 1389: 1385: 1384: 1382: 1380: 1377: 1374: 1371: 1370:57.8(0.5) min 1368: 1365: 1362: 1359: 1357: 1353: 1352: 1349: 1342: 1341: 1339: 1337: 1334: 1331: 1328: 1325: 1322: 1319: 1316: 1314: 1310: 1309: 1306: 1302: 1301: 1299: 1297: 1294: 1291: 1288: 1285: 1282: 1279: 1276: 1274: 1270: 1269: 1267: 1265: 1262: 1259: 1256: 1253: 1250: 1247: 1244: 1242: 1238: 1237: 1235: 1233: 1230: 1227: 1224: 1221: 1218: 1215: 1212: 1210: 1206: 1205: 1202: 1198: 1197: 1195: 1193: 1190: 1187: 1184: 1181: 1178: 1175: 1172: 1170: 1166: 1165: 1162: 1158: 1157: 1155: 1153: 1150: 1147: 1144: 1141: 1138: 1135: 1132: 1130: 1126: 1125: 1122: 1118: 1117: 1115: 1113: 1110: 1107: 1104: 1101: 1098: 1095: 1092: 1090: 1086: 1085: 1082: 1078: 1077: 1075: 1073: 1070: 1067: 1064: 1061: 1058: 1055: 1052: 1050: 1046: 1045: 1042: 1038: 1037: 1035: 1033: 1030: 1027: 1024: 1021: 1018: 1015: 1012: 1010: 1006: 1005: 1002: 998: 997: 995: 993: 990: 987: 984: 971: 968: 966: 962: 961: 959: 957: 954: 951: 948: 935: 932: 929: 926: 924: 920: 919: 916: 912: 911: 909: 907: 904: 901: 898: 885: 882: 879: 876: 874: 870: 869: 867: 865: 862: 859: 856: 843: 840: 838: 834: 833: 831: 829: 826: 823: 820: 807: 804: 801: 798: 796: 792: 791: 788: 781: 780: 778: 776: 773: 770: 767: 764: 761: 758: 755: 753: 749: 748: 746: 744: 741: 738: 733: 720: 718: 715: 712: 710: 706: 705: 702: 699: 695: 694: 686: 675: 667: 659: 653: 640: 633: 626: 621: 613: 610: 594:chain reaction 547:uranium series 445: 437: 436: 434: 433: 426: 419: 411: 408: 407: 405: 404: 390: 374: 372: 369: 368: 363: 353: 352: 349: 348: 343: 335: 334: 331: 325: 324: 319: 314: 305: 302: 296: 295: 292: 286: 285: 280: 275: 266: 263: 257: 256: 253: 247: 246: 241: 236: 227: 224: 218: 217: 214: 208: 207: 202: 197: 188: 185: 179: 178: 175: 169: 168: 163: 158: 149: 144: 138: 137: 134: 126: 125: 120: 113: 108: 103: 97: 96: 91: 86: 81: 71: 66: 63: 62: 57: 56:Main isotopes 42: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 7855: 7844: 7841: 7839: 7836: 7834: 7831: 7830: 7828: 7813: 7810: 7808: 7805: 7803: 7800: 7798: 7794: 7792: 7789: 7788: 7785: 7775: 7774: 7767: 7763: 7758: 7754: 7753: 7746: 7742: 7737: 7733: 7732: 7725: 7721: 7716: 7712: 7711: 7704: 7700: 7695: 7691: 7690: 7683: 7679: 7674: 7670: 7669: 7662: 7658: 7653: 7649: 7648: 7641: 7637: 7632: 7628: 7627: 7620: 7616: 7611: 7607: 7606: 7599: 7595: 7590: 7586: 7585: 7578: 7574: 7569: 7565: 7564: 7557: 7553: 7548: 7544: 7543: 7536: 7532: 7527: 7523: 7522: 7515: 7511: 7506: 7502: 7501: 7494: 7490: 7485: 7478: 7475: 7471: 7467: 7466: 7459: 7455: 7450: 7446: 7445: 7438: 7434: 7429: 7425: 7424: 7417: 7413: 7408: 7404: 7403: 7396: 7392: 7387: 7383: 7382: 7375: 7371: 7366: 7362: 7361: 7354: 7350: 7345: 7341: 7340: 7333: 7329: 7324: 7320: 7319: 7312: 7308: 7303: 7299: 7298: 7291: 7287: 7282: 7278: 7277: 7270: 7266: 7261: 7257: 7256: 7249: 7245: 7240: 7236: 7235: 7228: 7224: 7219: 7215: 7214: 7207: 7203: 7198: 7194: 7193: 7186: 7182: 7177: 7170: 7168: 7166: 7164: 7163: 7159: 7154: 7153: 7146: 7142: 7137: 7133: 7132: 7125: 7121: 7116: 7113: 7109: 7108: 7103: 7102: 7095: 7091: 7086: 7082: 7081: 7074: 7070: 7065: 7061: 7060: 7053: 7049: 7044: 7040: 7039: 7032: 7028: 7023: 7019: 7018: 7011: 7007: 7002: 6998: 6997: 6990: 6986: 6981: 6977: 6976: 6969: 6965: 6960: 6956: 6955: 6948: 6944: 6939: 6935: 6934: 6927: 6923: 6918: 6914: 6913: 6906: 6902: 6897: 6893: 6892: 6885: 6881: 6876: 6872: 6871: 6864: 6860: 6855: 6851: 6850: 6843: 6839: 6834: 6830: 6829: 6822: 6818: 6813: 6809: 6808: 6801: 6797: 6792: 6788: 6787: 6780: 6776: 6771: 6764: 6760: 6759: 6752: 6748: 6743: 6739: 6738: 6731: 6727: 6722: 6719: 6715: 6714: 6709: 6708: 6701: 6697: 6692: 6688: 6687: 6680: 6676: 6671: 6667: 6666: 6659: 6655: 6650: 6646: 6645: 6638: 6634: 6629: 6625: 6624: 6617: 6613: 6608: 6604: 6603: 6596: 6592: 6587: 6583: 6582: 6575: 6571: 6566: 6562: 6561: 6554: 6550: 6545: 6541: 6540: 6533: 6529: 6524: 6520: 6519: 6512: 6508: 6503: 6499: 6498: 6491: 6487: 6482: 6478: 6477: 6470: 6466: 6461: 6457: 6456: 6449: 6445: 6440: 6436: 6435: 6428: 6424: 6419: 6415: 6414: 6407: 6403: 6398: 6394: 6393: 6386: 6382: 6377: 6370: 6366: 6365: 6358: 6354: 6349: 6345: 6344: 6337: 6333: 6328: 6325: 6321: 6320: 6315: 6314: 6307: 6303: 6298: 6294: 6293: 6286: 6282: 6277: 6273: 6272: 6265: 6261: 6256: 6252: 6251: 6244: 6240: 6235: 6231: 6230: 6223: 6219: 6214: 6210: 6209: 6202: 6198: 6193: 6189: 6188: 6181: 6177: 6172: 6168: 6167: 6160: 6156: 6151: 6147: 6146: 6139: 6135: 6130: 6126: 6125: 6118: 6114: 6109: 6105: 6104: 6097: 6093: 6088: 6084: 6083: 6076: 6072: 6067: 6063: 6062: 6055: 6051: 6046: 6042: 6041: 6034: 6030: 6025: 6021: 6020: 6013: 6009: 6004: 6000: 5999: 5992: 5988: 5983: 5981: 5977: 5976: 5969: 5965: 5960: 5956: 5955: 5948: 5944: 5939: 5936: 5932: 5931: 5926: 5925: 5918: 5914: 5909: 5905: 5904: 5897: 5893: 5888: 5884: 5883: 5876: 5872: 5867: 5863: 5862: 5855: 5851: 5846: 5842: 5841: 5834: 5830: 5825: 5821: 5820: 5813: 5809: 5804: 5800: 5799: 5792: 5788: 5783: 5779: 5778: 5771: 5767: 5762: 5758: 5757: 5750: 5746: 5741: 5737: 5736: 5729: 5725: 5720: 5716: 5715: 5708: 5704: 5699: 5695: 5694: 5687: 5683: 5678: 5674: 5673: 5666: 5662: 5657: 5653: 5652: 5645: 5641: 5636: 5632: 5631: 5624: 5620: 5615: 5611: 5610: 5603: 5599: 5594: 5592: 5588: 5587: 5580: 5576: 5571: 5567: 5566: 5559: 5555: 5550: 5547: 5543: 5542: 5537: 5536: 5529: 5525: 5520: 5516: 5515: 5508: 5504: 5499: 5495: 5494: 5487: 5483: 5478: 5474: 5473: 5466: 5462: 5457: 5453: 5452: 5445: 5441: 5436: 5432: 5431: 5424: 5420: 5415: 5409: 5408: 5401: 5397: 5392: 5388: 5387: 5380: 5376: 5371: 5368: 5364: 5363: 5358: 5357: 5350: 5346: 5341: 5337: 5336: 5329: 5325: 5320: 5316: 5315: 5308: 5304: 5299: 5295: 5294: 5287: 5283: 5278: 5274: 5273: 5266: 5262: 5257: 5253: 5252: 5245: 5241: 5236: 5230: 5229: 5222: 5218: 5213: 5209: 5208: 5201: 5197: 5192: 5189: 5185: 5184: 5179: 5178: 5171: 5167: 5162: 5156: 5155: 5148: 5144: 5139: 5136: 5132: 5131: 5127: 5124: 5121: 5118: 5116: 5114: 5112: 5110: 5108: 5106: 5104: 5102: 5100: 5098: 5096: 5094: 5092: 5090:earth metals 5087: 5082: 5079: 5075: 5074: 5071: 5068: 5066: 5063: 5061: 5058: 5056: 5053: 5051: 5048: 5046: 5043: 5041: 5038: 5036: 5033: 5031: 5028: 5026: 5023: 5021: 5018: 5016: 5013: 5011: 5008: 5006: 5003: 5001: 4998: 4996: 4993: 4990: 4988: 4985: 4983: 4980: 4977: 4973: 4972: 4967: 4963: 4959: 4952: 4947: 4945: 4940: 4938: 4933: 4932: 4929: 4918: 4914: 4910: 4906: 4902: 4898: 4894: 4890: 4886: 4878: 4875: 4864: 4860: 4853: 4851: 4847: 4843: 4838: 4835: 4831: 4826: 4823: 4818: 4814: 4809: 4804: 4800: 4796: 4792: 4788: 4784: 4777: 4774: 4769: 4765: 4761: 4757: 4753: 4749: 4742: 4739: 4734: 4730: 4726: 4720: 4716: 4712: 4705: 4704: 4697: 4695: 4691: 4686: 4682: 4678: 4676:0-8493-6081-1 4672: 4668: 4661: 4659: 4655: 4650: 4646: 4642: 4638: 4635:(3): 030001. 4634: 4630: 4623: 4616: 4613: 4608: 4601: 4594: 4591: 4587:. 2011-12-14. 4586: 4582: 4576: 4573: 4560: 4556: 4555:"Uranium 232" 4550: 4547: 4534: 4528: 4525: 4512: 4506: 4503: 4491: 4487: 4483: 4479: 4475: 4471: 4467: 4463: 4458: 4453: 4449: 4445: 4441: 4434: 4431: 4418: 4412: 4409: 4405: 4401: 4395: 4392: 4388: 4382: 4379: 4372: 4368: 4364: 4360: 4356: 4352: 4345: 4342: 4338: 4334: 4328: 4325: 4321: 4317: 4313: 4307: 4304: 4293: 4292: 4287: 4280: 4277: 4266: 4262: 4258: 4257: 4252: 4245: 4243: 4239: 4234: 4230: 4226: 4222: 4218: 4214: 4210: 4206: 4199: 4192: 4189: 4184: 4180: 4176: 4172: 4167: 4162: 4158: 4154: 4146: 4143: 4135: 4131: 4127: 4120: 4113: 4111: 4107: 4102: 4098: 4095:(6): 581–97. 4094: 4090: 4083: 4080: 4067: 4062: 4058: 4054: 4050: 4042: 4039: 4034: 4030: 4026: 4022: 4018: 4014: 4011:(2): 024305. 4010: 4006: 3998: 3996: 3992: 3987: 3983: 3979: 3975: 3971: 3967: 3963: 3959: 3954: 3949: 3945: 3941: 3933: 3930: 3925: 3921: 3918:(3): 030003. 3917: 3913: 3906: 3903: 3890: 3884: 3881: 3876: 3872: 3868: 3864: 3860: 3856: 3848: 3845: 3840: 3836: 3830: 3827: 3812: 3811: 3803: 3800: 3795: 3791: 3788:(3): 030001. 3787: 3783: 3776: 3769: 3767: 3765: 3763: 3761: 3757: 3750: 3748: 3746: 3742: 3741: 3732: 3730: 3728: 3727:plutonium-239 3723: 3721: 3720:neptunium-239 3717: 3713: 3709: 3702: 3700: 3698: 3694: 3690: 3684: 3681: 3677: 3676:plutonium-239 3673: 3669: 3665: 3661: 3657: 3653: 3647: 3639: 3637: 3635: 3631: 3627: 3626:neptunium-237 3623: 3616: 3614: 3612: 3608: 3604: 3599: 3591: 3589: 3587: 3583: 3579: 3575: 3571: 3570:cross section 3567: 3563: 3562:million years 3559: 3554: 3552: 3548: 3544: 3541: 3537: 3533: 3527: 3519: 3517: 3515: 3514:cross section 3511: 3510:neptunium-239 3507: 3506:plutonium-239 3503: 3499: 3495: 3491: 3487: 3482: 3481:—becoming U. 3480: 3476: 3472: 3468: 3464: 3460: 3456: 3454: 3450: 3449:plutonium-238 3446: 3442: 3438: 3434: 3429: 3427: 3423: 3419: 3414: 3412: 3408: 3404: 3400: 3396: 3392: 3388: 3382: 3374: 3372: 3370: 3369:neptunium-236 3366: 3365:plutonium-241 3362: 3361:plutonium-239 3358: 3354: 3349: 3347: 3343: 3339: 3336:, it becomes 3335: 3330: 3327: 3321: 3313: 3311: 3309: 3305: 3301: 3297: 3293: 3289: 3288:thorium cycle 3283: 3275: 3273: 3267: 3263: 3255: 3245: 3241: 3238: 3234: 3232: 3228: 3225: 3221: 3220: 3217: 3213: 3201: 3195: 3192: 3186: 3184: 3182: 3180: 3174: 3166: 3164: 3163:15–24 Ma 3161: 3154: 3152: 3146: 3133: 3130: 3128: 3126: 3119: 3118: 3110: 3107: 3105: 3103: 3101: 3099: 3098: 3090: 3088: 3085: 3083: 3076: 3070: 3057: 3052: 3036: 3032: 3020: 3018: 3017: 3014:24.1 ka 3013: 3006: 3004: 3002: 3001: 2997: 2995: 2983: 2982: 2978: 2957: 2953: 2941: 2939: 2938: 2934: 2927: 2920: 2919: 2916: 2905: 2903: 2891: 2890: 2872: 2869: 2857: 2851: 2833: 2830: 2809: 2806: 2804: 2802: 2800: 2797: 2795: 2793: 2791: 2785: 2782: 2775: 2773: 2770: 2768: 2766: 2764: 2758: 2754: 2751: 2748: 2746: 2744: 2739: 2737: 2735: 2730: 2728: 2726: 2721: 2719: 2718: 2713: 2712: 2709: 2705: 2701: 2695: 2690: 2685: 2681: 2677: 2670: 2665: 2663: 2658: 2656: 2651: 2650: 2645: 2639: 2630: 2627: 2621: 2618: 2615: 2609: 2606: 2602: 2598: 2592: 2589: 2583: 2580: 2577: 2571: 2569: 2565: 2562: 2556: 2554: 2550: 2546: 2545:decay product 2543:Intermediate 2540: 2537: 2534: 2528: 2526: 2522: 2519: 2513: 2510: 2507: 2501: 2498: 2492: 2490: 2486: 2480: 2477: 2473: 2468: 2465: 2461: 2460: 2454: 2451: 2444: 2441: 2438: 2437: 2434: 2431: 2428: 2427: 2424: 2423:Cluster decay 2421: 2418: 2417: 2411: 2408: 2402: 2399: 2395: 2389: 2386: 2382: 2376: 2373: 2362: 2357: 2356: 2354: 2349: 2346: 2344: 2341: 2338: 2335: 2332: 2329: 2326: 2323: 2321: 2318: 2317: 2314: 2311: 2308: 2305: 2302: 2300:241.06031(5) 2299: 2296: 2293: 2291: 2288: 2287: 2283: 2280: 2279: 2267: 2264: 2246: 2242: 2239: 2238: 2227: 2224: 2212: 2209: 2207: 2204: 2201: 2198: 2195: 2190: 2187: 2186: 2183: 2180: 2177: 2174: 2171: 2168: 2165: 2162: 2159: 2157: 2154: 2153: 2149: 2146: 2145: 2135: 2134: 2130: 2127: 2115: 2111: 2108: 2105: 2104: 2100: 2097: 2096: 2082: 2079: 2062: 2058: 2055: 2053: 2050: 2047: 2044: 2041: 2036: 2033: 2032: 2029: 2026: 2023: 2020: 2018: 2015: 2012: 2009: 2006: 2003: 2001: 1998: 1997: 1993: 1990: 1989: 1978: 1975: 1963: 1960: 1958: 1955: 1952: 1949: 1946: 1941: 1938: 1937: 1931: 1928: 1927: 1921: 1918: 1917: 1913: 1911:SF (9.6×10%) 1910: 1909: 1898: 1897: 1893: 1890: 1873: 1869: 1866: 1864: 1862: 1859: 1856: 1853: 1848: 1845: 1844: 1841: 1839: 1836: 1834: 1833: 1829: 1826: 1823: 1818: 1815: 1814: 1808: 1805: 1804: 1798: 1795: 1794: 1788: 1785: 1784: 1780: 1777: 1776: 1762: 1759: 1743:Actin Uranium 1740: 1736: 1733: 1731: 1728: 1725: 1723: 1720: 1718:33.5(2.0) ms 1717: 1712: 1709: 1708: 1702: 1699: 1698: 1693: 1690: 1687: 1686: 1680: 1678:CD (1.4×10%) 1677: 1676: 1672: 1669: 1668: 1654: 1651: 1634: 1630: 1624: 1621: 1620: 1616: 1613: 1612: 1606: 1603: 1602: 1590: 1587: 1571: 1567: 1562: 1559: 1556: 1555: 1551: 1548: 1547: 1542: 1539: 1536: 1533: 1532: 1521: 1518: 1502: 1498: 1494: 1491: 1490: 1479: 1476: 1458: 1455: 1454: 1449: 1448: 1444: 1441: 1438: 1437: 1433: 1430: 1427: 1426: 1415: 1412: 1394: 1390: 1387: 1386: 1375: 1372: 1354: 1350: 1347: 1344: 1343: 1332: 1329: 1327:9.1(0.2) min 1311: 1307: 1304: 1303: 1292: 1289: 1287:1.1(0.1) min 1271: 1268: 1266: 1263: 1260: 1257: 1254: 1251: 1248: 1245: 1243: 1240: 1239: 1236: 1234: 1231: 1228: 1225: 1222: 1219: 1216: 1213: 1211: 1208: 1207: 1203: 1200: 1199: 1188: 1185: 1167: 1163: 1160: 1159: 1148: 1145: 1127: 1123: 1120: 1119: 1108: 1105: 1087: 1083: 1080: 1079: 1068: 1065: 1047: 1043: 1040: 1039: 1028: 1025: 1007: 1003: 1000: 999: 988: 985: 963: 960: 958: 955: 952: 949: 936: 933: 930: 927: 925: 922: 921: 917: 914: 913: 902: 899: 871: 868: 866: 863: 860: 857: 844: 839: 836: 835: 832: 830: 827: 824: 821: 808: 805: 802: 799: 797: 794: 793: 789: 786: 783: 782: 771: 768: 750: 747: 745: 742: 739: 737: 734: 721: 719: 716: 713: 711: 708: 707: 703: 700: 696: 690: 684: 679: 673: 665: 657: 649: 644: 643:Isotopic mass 639: 638: 632: 631: 617: 611: 609: 607: 606:plutonium-239 603: 599: 595: 591: 587: 583: 579: 575: 570: 569:bombardment. 568: 564: 560: 556: 552: 548: 544: 543:alpha emitter 539: 537: 532:10 years 525: 524:radioisotopes 521: 517: 513: 508: 498: 494: 490: 486: 482: 479: 478:decay product 475: 474:Earth's crust 471: 467: 463: 459: 456:. It has two 455: 451: 443: 432: 427: 425: 420: 418: 413: 412: 409: 402: 391: 376: 375: 373: 370: 362: 358: 354: 347: 344: 341: 337: 336: 332: 327: 326: 323: 320: 315: 301: 297: 293: 288: 287: 284: 281: 276: 262: 258: 254: 249: 248: 245: 242: 237: 223: 219: 215: 210: 209: 206: 203: 198: 184: 180: 176: 171: 170: 167: 164: 159: 148: 143: 139: 135: 132: 128: 127: 124: 121: 118: 114: 107: 102: 98: 95: 94:pro­duct 92: 90: 87: 80: 75: 72: 70: 67: 65: 64: 61: 54: 50: 38: 34: 19: 7795:Categories: 7771: 7750: 7729: 7708: 7687: 7666: 7645: 7624: 7603: 7582: 7561: 7551: 7540: 7519: 7498: 7463: 7442: 7421: 7400: 7379: 7358: 7337: 7316: 7295: 7274: 7253: 7232: 7211: 7190: 7150: 7129: 7099: 7078: 7057: 7036: 7015: 6994: 6973: 6952: 6931: 6910: 6889: 6868: 6847: 6826: 6805: 6784: 6756: 6735: 6705: 6684: 6663: 6642: 6621: 6600: 6579: 6558: 6537: 6516: 6495: 6474: 6453: 6432: 6411: 6390: 6362: 6341: 6311: 6290: 6269: 6248: 6227: 6206: 6185: 6164: 6143: 6122: 6101: 6080: 6059: 6038: 6017: 5996: 5973: 5952: 5922: 5901: 5880: 5859: 5838: 5817: 5796: 5775: 5754: 5733: 5712: 5691: 5670: 5649: 5628: 5607: 5584: 5563: 5533: 5512: 5491: 5470: 5449: 5428: 5405: 5384: 5354: 5333: 5312: 5291: 5270: 5249: 5226: 5205: 5175: 5152: 5128:Noble gases 5083:Hydrogen and 4892: 4888: 4877: 4866:. Retrieved 4862: 4841: 4837: 4829: 4825: 4790: 4786: 4776: 4751: 4747: 4741: 4710: 4702: 4666: 4632: 4628: 4615: 4606: 4593: 4584: 4575: 4563:. Retrieved 4549: 4537:. Retrieved 4527: 4515:. Retrieved 4505: 4493:. Retrieved 4447: 4443: 4433: 4421:. Retrieved 4411: 4394: 4381: 4354: 4350: 4344: 4327: 4319: 4306: 4295:. Retrieved 4289: 4279: 4268:. Retrieved 4254: 4208: 4204: 4191: 4156: 4152: 4145: 4134:the original 4129: 4125: 4092: 4088: 4082: 4070:. Retrieved 4056: 4052: 4041: 4008: 4004: 3943: 3939: 3932: 3915: 3911: 3905: 3893:. Retrieved 3883: 3858: 3847: 3829: 3818:. Retrieved 3809: 3802: 3785: 3781: 3744: 3738: 3736: 3724: 3707: 3706: 3685: 3649: 3621: 3620: 3611:nuclear fuel 3602: 3601: 3555: 3529: 3483: 3457: 3445:ion-exchange 3430: 3418:alpha decays 3415: 3395:alpha decays 3384: 3350: 3331: 3323: 3285: 3259: 3190: 3109:1.33 Ma 2909: 2871:29–97 a 2832:10–29 a 2742: 2733: 2724: 2716: 2629: 2620: 2608: 2591: 2582: 2561:radionuclide 2539: 2512: 2500: 2479: 2471: 2467: 2458: 2457: 2453: 2410: 2401: 2393: 2388: 2375: 2352: 2262:14.1(0.1) h 2132: 2131: 1895: 1894: 1876:Thoruranium 1831: 1830: 1824:25.7(1) min 1700:CD (≤9×10%) 1691: 1688:CD (≤9×10%) 1560: 1540: 1516:68.9(0.4) y 1451: 1445: 1103:4.7(0.7) μs 1063:0.66(14) μs 766:1.4(0.9) ms 636: 629: 571: 540: 509: 440: 360: 78: 4404:quadrillion 3745:uranium-241 3733:Uranium-241 3716:beta decays 3708:Uranium-239 3703:Uranium-239 3697:uranium-232 3693:uranium-233 3689:uranium-234 3672:beta decays 3646:Uranium-238 3640:Uranium-238 3622:Uranium-237 3617:Uranium-237 3603:Uranium-236 3598:Uranium-236 3592:Uranium-236 3586:uranium-236 3580:. For fast 3532:uranium-238 3526:Uranium-235 3520:Uranium-235 3502:uranium-238 3463:uranium-235 3422:thorium-230 3407:beta decays 3399:thorium-234 3381:Uranium-234 3375:Uranium-234 3357:uranium-235 3353:uranium-234 3342:beta decays 3338:thorium-233 3326:thorium-232 3320:Uranium-233 3314:Uranium-233 3282:Uranium-232 3276:Uranium-232 3270:0.5 ms 3256:Uranium-214 3187:80 Ma 2755:<0.001% 2752:0.04–1.25% 2684:decay chain 2559:Primordial 2472:Bold symbol 2222:>250 ns 2196:780(40) ns 2128:IT (97.4%) 2013:6.752(2) d 1854:3.6(18) ms 1806:CD (8×10%) 1796:CD (8×10%) 1786:CD (8×10%) 1778:SF (7×10%) 1637:Uranium II 1474:4.2(0.1) d 1183:396(17) μs 563:thorium-232 534:(about the 520:radioactive 485:uranium-233 481:uranium-234 466:uranium-235 462:uranium-238 450:radioactive 111:68.9 y 7827:Categories 4868:2023-04-10 4713:. Vienna: 4457:2101.06023 4357:(2): 299. 4297:2023-04-12 4270:2023-04-12 4166:2312.17041 3953:2101.06023 3820:2014-08-06 3751:References 3630:beta decay 3549:that is a 2772:4–6 a 2228:(various) 2150:(various) 2147:SF (2.6%) 2125:280(6) ns 2109:(2.2×10%) 2101:(various) 2065:Uranium I 2042:155(6) ns 1994:(various) 1973:120(2) ns 1947:100(4) ns 1914:(various) 1860:(various) 1781:(various) 1673:(various) 1622:CD ? 1617:(various) 1614:SF ? 1552:(various) 1537:(8.9×10%) 1492:α (.004%) 1442:(4.8×10%) 1434:(various) 1330:α (97.5%) 1255:269(6) ms 1143:65(12) μs 470:half-lives 4917:257976576 4733:1684-2073 4607:Ornl-6952 4490:231627674 4316:radon-222 4265:0971-751X 4256:The Hindu 4233:257976576 4183:2469-9985 4033:251359451 4025:2469-9985 3986:231627674 3875:1365-3075 3662:, but is 3572:for slow 3560:of 703.8 3558:half-life 3437:chemistry 3403:half-life 3391:half-life 3242:þ,  3229:ƒ,  2912:half-life 2689:Half-life 2680:Actinides 2093:0.992752 2091:0.992739– 1991:SF (13%) 1976:IT (87%) 1773:0.007207 1771:0.007198– 1665:0.000059 1663:0.000050– 1549:SF (10%) 1223:62(4) ms 1023:60(7) μs 970:2117 keV 842:2206 keV 656:Half-life 366:°(U) 312:10 y 273:10 y 234:10 y 195:10 y 156:10 y 74:half-life 7797:Isotopes 7762:Isotopes 7741:Isotopes 7720:Isotopes 7699:Isotopes 7678:Isotopes 7657:Isotopes 7636:Isotopes 7615:Isotopes 7594:Isotopes 7573:Isotopes 7552:Isotopes 7531:Isotopes 7510:Isotopes 7489:Isotopes 7454:Isotopes 7433:Isotopes 7412:Isotopes 7391:Isotopes 7370:Isotopes 7349:Isotopes 7328:Isotopes 7307:Isotopes 7286:Isotopes 7265:Isotopes 7244:Isotopes 7223:Isotopes 7202:Isotopes 7181:Isotopes 7141:Isotopes 7120:Isotopes 7112:⑧ 7090:Isotopes 7069:Isotopes 7048:Isotopes 7027:Isotopes 7006:Isotopes 6985:Isotopes 6964:Isotopes 6943:Isotopes 6922:Isotopes 6901:Isotopes 6880:Isotopes 6859:Isotopes 6838:Isotopes 6817:Isotopes 6796:Isotopes 6775:Isotopes 6747:Isotopes 6726:Isotopes 6718:⑦ 6696:Isotopes 6675:Isotopes 6654:Isotopes 6633:Isotopes 6612:Isotopes 6591:Isotopes 6570:Isotopes 6549:Isotopes 6528:Isotopes 6507:Isotopes 6486:Isotopes 6465:Isotopes 6444:Isotopes 6423:Isotopes 6402:Isotopes 6381:Isotopes 6353:Isotopes 6332:Isotopes 6324:⑥ 6302:Isotopes 6281:Isotopes 6260:Isotopes 6239:Isotopes 6218:Isotopes 6197:Isotopes 6176:Isotopes 6155:Isotopes 6134:Isotopes 6113:Isotopes 6092:Isotopes 6071:Isotopes 6050:Isotopes 6029:Isotopes 6008:Isotopes 5987:Isotopes 5964:Isotopes 5943:Isotopes 5935:⑤ 5913:Isotopes 5892:Isotopes 5871:Isotopes 5850:Isotopes 5829:Isotopes 5808:Isotopes 5787:Isotopes 5766:Isotopes 5745:Isotopes 5724:Isotopes 5703:Isotopes 5682:Isotopes 5661:Isotopes 5640:Isotopes 5619:Isotopes 5598:Isotopes 5575:Isotopes 5554:Isotopes 5546:④ 5524:Isotopes 5503:Isotopes 5482:Isotopes 5461:Isotopes 5440:Isotopes 5419:Isotopes 5396:Isotopes 5375:Isotopes 5367:③ 5345:Isotopes 5324:Isotopes 5303:Isotopes 5282:Isotopes 5261:Isotopes 5240:Isotopes 5217:Isotopes 5196:Isotopes 5188:② 5166:Isotopes 5143:Isotopes 5135:① 5088:Alkaline 4958:Isotopes 4909:37067317 4863:phys.org 4817:21785255 4717:. 2009. 4685:89-25332 4559:Archived 4482:33929212 4312:polonium 4291:Phys.org 4225:37067317 3978:33929212 3895:14 March 3582:neutrons 3534:, it is 3484:U has a 3475:neutrons 3306:that is 2574:Used in 2531:Used in 2516:Used in 2303:~40 min 1431: ? 1388:α (20%) 1373:β (80%) 982: μs 946: μs 896: ms 854: ms 818: ms 731: ms 670:Daughter 623:Historic 598:critical 551:lead-206 512:isotopes 401:abridged 33:Isotopes 7838:Uranium 7764: 7743: 7722: 7701: 7680: 7659: 7638: 7617: 7596: 7575: 7554: 7533: 7512: 7491: 7472:  7456: 7435: 7414: 7393: 7372: 7351: 7330: 7309: 7288: 7267: 7246: 7225: 7204: 7183: 7143: 7122: 7092: 7071: 7050: 7029: 7008: 6987: 6966: 6945: 6924: 6903: 6882: 6861: 6840: 6819: 6798: 6777: 6749: 6728: 6698: 6677: 6656: 6635: 6614: 6593: 6572: 6551: 6530: 6509: 6488: 6467: 6446: 6425: 6404: 6383: 6355: 6334: 6304: 6283: 6262: 6241: 6220: 6199: 6178: 6157: 6136: 6115: 6094: 6073: 6052: 6031: 6010: 5989: 5966: 5945: 5915: 5894: 5873: 5852: 5831: 5810: 5789: 5768: 5747: 5726: 5705: 5684: 5663: 5642: 5621: 5600: 5577: 5556: 5526: 5505: 5484: 5463: 5442: 5421: 5398: 5377: 5347: 5326: 5305: 5284: 5263: 5242: 5219: 5198: 5168: 5145: 4991:  4960:of the 4808:3171289 4756:Bibcode 4637:Bibcode 4462:Bibcode 4359:Bibcode 4072:24 June 3958:Bibcode 3841:. 1999. 3668:neutron 3664:fertile 3660:fissile 3656:uranium 3652:isotope 3540:fission 3536:fissile 3471:fissile 3441:physics 3387:million 3334:neutron 3308:fissile 3262:Lanzhou 3231:fissile 2749:4.5–7% 2692:range ( 1379:(3/2+) 1348:(2.5%) 1296:(3/2+) 1072:(9/2+) 1032:(9/2+) 906:(1/2−) 672:isotope 619:Nuclide 602:fertile 582:fissile 567:neutron 501:238.028 442:Uranium 399: ( 378:238.028 226:0.720% 187:0.005% 37:uranium 5078:Period 4915:  4907:  4815:  4805:  4731:  4721:  4683:  4673:  4565:3 June 4539:15 May 4517:15 May 4495:15 May 4488:  4480:  4423:15 May 4406:years. 4263:  4231:  4223:  4181:  4031:  4023:  3984:  3976:  3873:  3695:, and 3504:is to 3239:(NORM) 2394:σ 2312:7/2+# 2274:Trace 2181:Trace 2027:Trace 1904:Trace 1597:Trace 1483:5/2+# 1232:5/2+# 1152:7/2+# 775:5/2−# 683:parity 553:. The 528:4.4683 476:. The 393:238.03 304:99.3% 265:trace 39:  4976:Group 4913:S2CID 4707:(PDF) 4625:(PDF) 4603:(PDF) 4486:S2CID 4452:arXiv 4229:S2CID 4201:(PDF) 4161:arXiv 4137:(PDF) 4122:(PDF) 4029:S2CID 3982:S2CID 3948:arXiv 3839:CIAAW 3814:(PDF) 3778:(PDF) 3718:into 3578:barns 3508:(via 3490:barns 3477:in a 3405:, Th 3344:into 3298:from 3266:China 2708:yield 2205:1/2+ 2178:5/2+ 2051:7/2− 2024:1/2+ 1982:(0+) 1837:1/2+ 1766:7/2− 1594:5/2+ 891:+13.3 851:−0.16 849:+0.24 815:−0.40 813:+0.63 728:−0.21 726:+0.95 662:Decay 625:name 549:into 385:0.000 308:4.468 269:2.342 191:2.455 152:1.592 147:trace 106:synth 60:Decay 7777:102 7756:101 7735:100 7156:120 7135:119 7105:118 7084:117 7063:116 7042:115 7021:114 7000:113 6979:112 6958:111 6937:110 6916:109 6895:108 6874:107 6853:106 6832:105 6811:104 6790:103 4905:PMID 4813:PMID 4729:ISSN 4719:ISBN 4681:LCCN 4671:ISBN 4567:2019 4541:2021 4519:2021 4497:2021 4478:PMID 4425:2021 4320:days 4261:ISSN 4221:PMID 4179:ISSN 4074:2023 4021:ISSN 3974:PMID 3897:2012 3871:ISSN 3492:for 3359:and 2603:of U 2547:of U 2360:view 2327:150 2297:149 2256:148 2240:IT? 2225:SF? 2163:147 2071:146 2007:145 1882:144 1751:143 1643:142 1579:141 1557:CD? 1510:140 1468:139 1404:138 1364:137 1321:136 1281:135 1249:134 1217:133 1177:132 1137:131 1097:130 1057:129 1017:127 1001:IT? 931:126 893:−5.6 888:19.3 881:125 846:0.89 810:2.25 803:124 760:123 723:0.52 717:122 678:Spin 664:mode 464:and 430:edit 423:talk 416:view 397:0.01 230:7.04 89:mode 7714:99 7693:98 7672:97 7651:96 7630:95 7609:94 7588:93 7567:92 7546:91 7525:90 7504:89 7469:70 7448:69 7427:68 7406:67 7385:66 7364:65 7343:64 7322:63 7301:62 7280:61 7259:60 7238:59 7217:58 7196:57 7152:Ubn 7131:Uue 6762:88 6741:87 6711:86 6690:85 6669:84 6648:83 6627:82 6606:81 6585:80 6564:79 6543:78 6522:77 6501:76 6480:75 6459:74 6438:73 6417:72 6396:71 6368:56 6347:55 6317:54 6296:53 6275:52 6254:51 6233:50 6212:49 6191:48 6170:47 6149:46 6128:45 6107:44 6086:43 6065:42 6044:41 6023:40 6002:39 5979:38 5958:37 5928:36 5907:35 5886:34 5865:33 5844:32 5823:31 5802:30 5781:29 5760:28 5739:27 5718:26 5697:25 5676:24 5655:23 5634:22 5613:21 5590:20 5569:19 5539:18 5518:17 5497:16 5476:15 5455:14 5434:13 5411:12 5390:11 5360:10 4897:doi 4893:130 4803:PMC 4795:doi 4764:doi 4752:109 4645:doi 4470:doi 4448:126 4367:doi 4213:doi 4209:130 4171:doi 4157:109 4097:doi 4061:doi 4013:doi 4009:106 3966:doi 3944:126 3920:doi 3863:doi 3790:doi 3654:of 3628:by 3420:to 3409:to 3397:to 3199:Th 3178:Pu 3159:Cm 3143:Pd 3138:Zr 3124:Np 3115:Cs 3095:Se 3081:Pu 3074:Cm 3067:Sn 3062:Tc 3040:Np 3030:Pa 3025:Th 3011:Pu 2993:Cm 2988:Cm 2976:Am 2971:Cm 2966:Th 2961:Pu 2951:Bk 2946:Ra 2932:Cf 2925:Am 2901:Am 2896:Cf 2887:Sn 2882:Sm 2877:Cs 2867:Cm 2862:Pu 2848:Cd 2843:Kr 2838:Sr 2828:Ac 2823:Cf 2818:Pu 2813:Cm 2789:Bk 2780:Eu 2762:Ra 2745:+ 3 2736:+ 2 2727:+ 1 2706:by 2702:of 2682:by 2439:SF: 2429:EC: 2419:CD: 2342:0+ 2339:Np 2324:92 2309:Np 2294:92 2284:Th 2281:α? 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Index

Uranium isotopes
Isotopes
uranium
Decay
abun­dance
half-life
mode
pro­duct
U
synth
α
Th
SF
U
trace
Th
U
Th
U
Th
U
Th
U
Th
ββ
Pu
Standard atomic weight
abridged
view
talk

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