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can be calculated by the RELIC application software. Judd–Ofelt intensity parameters and derived quantities (oscillator strengths, radiative transition probabilities, luminescence branching ratios, excited state radiative lifetimes, and estimates of quantum efficiencies) from the emission spectrum of
163:). These parameters account for the asymmetric nature of the crystal field and enable the calculation of transition probabilities, oscillator strengths, and radiative lifetimes of excited states, which are crucial for the development of various photonic devices such as lasers and optical amplifiers.
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The theory is a powerful theoretical framework used to predict and analyze the intensities of electronic transitions within the 4f electron shell of rare-earth ions in solid-state materials. The transitions, which are parity forbidden in free ions, are made partially allowed in a solid matrix due to
604:
Moura Jr., Renaldo T.; Carneiro Neto, Albano N.; Aguiar, Eduardo C.; Santos-Jr., Carlos V.; de Lima, Ewerton M.; Faustino, Wagner M.; Teotonio, Ercules E.S.; Brito, Hermi F.; Felinto, Maria C.F.C.; Ferreira, Rute A.S.; Carlos, Luís D.; Longo, Ricardo L.; Malta, Oscar L. (2021).
98:. This field induces a mixing of electronic states, allowing transitions that would not occur in an isolated ion. The theory quantitatively describes this mixing using three phenomenological parameters, denoted as
528:Ćirić, Aleksandar; Stojadinović, Stevan; Sekulić, Milica; Dramićanin, Miroslav D. (January 2019). "JOES: An application software for Judd-Ofelt analysis from Eu emission spectra".
123:
369:
Hehlen, Markus P.; Brik, Mikhail G.; Krämer, Karl W. (April 2013). "50th anniversary of the Judd–Ofelt theory: An experimentalist's view of the formalism and its application".
173:, providing insights into the optical properties of rare earth-doped materials and aiding in the design of materials for color display systems, fluorescent lamps, and lasers.
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The theory is named after Brian G. Judd and George S. Ofelt, who independently developed it in 1962. It has become a standard tool in the field of
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Dutra, José Diogo L.; Bispo, Thiago D.; Freire, Ricardo O. (2014). "LUMPAC lanthanide luminescence software: Efficient and user friendly".
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can be obtained using the LUMPAC software. Additionally, the JOYSpectra web platform provides these parameters for all
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doped compounds, can be obtained by the JOES application software. Theoretical Judd-Ofelt intensity parameters for
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Judd and Ofelt's work was cited approximately 2000 times between 1962 and 2004. Brian M. Walsh of
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315:. The International School of Atomic and Molecular Spectroscopy. Erice, Italy
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479:"One-photon rare earth optical transitions: recent theoretical developments"
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places Judd and Ofelt's theory at the "forefront" of a 1960s revolution in
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Ofelt, G. S. (1962). "Intensities of
Crystal Spectra of Rare-Earth Ions".
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66:, respectively. Judd and Ofelt did not meet until 2003 at a workshop in
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The theory was introduced independently in 1962 by Brian R. Judd of the
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Bibliography of the research by Judd and Ofelt supporting the theory
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564:"JOES – Judd-Ofelt from emission spectrum Software – OMAS Group"
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Judd–Ofelt intensity parameters from absorption spectrum of any
607:"JOYSpectra: A web platform for luminescence of lanthanides"
639:"JOYSpectra a web platform for luminescence of lanthanides"
341:"Chapter 21: Judd-Ofelt theory: Principles and practices"
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690:"Intensities of Crystal Spectra of Rare-Earth Ions"
654:"OPTICAL ABSORPTION INTENSITIES OF RARE-EARTH IONS"
406:"Optical Absorption Intensities of Rare-Earth Ions"
236:Intensities of Crystal Spectra of Rare-Earth Ions
225:Optical Absorption Intensities of Rare-Earth Ions
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345:Advances in Spectroscopy for Lasers and Sensing
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504:"Judd-Ofelt theory: principles and practices"
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309:Judd–Ofelt Theory: Principles and Practices
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343:. In Di Bartolo, B.; Forte, O. (eds.).
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50:, and PhD candidate George S. Ofelt at
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483:Digital Commons @ Andrews University
747:. You can help Knowledge (XXG) by
579:Journal of Computational Chemistry
118:{\displaystyle \Omega _{\lambda }}
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48:University of California, Berkeley
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688:Ofelt, G. S. (1 August 1962).
156:{\displaystyle \lambda =2,4,6}
54:. Their work was published in
43:ions in solids and solutions.
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306:Walsh, Brian M. (June 2005).
85:research on rare-earth ions.
542:10.1016/j.jlumin.2018.09.048
391:10.1016/j.jlumin.2012.10.035
28:describing the intensity of
16:Theory in physical chemistry
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63:Journal of Chemical Physics
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624:10.1016/j.omx.2021.100080
814:Physical chemistry stubs
272:John Hasbrouck Van Vleck
52:Johns Hopkins University
530:Journal of Luminescence
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371:Journal of Luminescence
743:-related article is a
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282:Brian Garner Wybourne
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32:within the 4
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700:: 511–520.
536:: 351–356.
377:: 221–239.
351:18 November
319:18 November
313:(slideshow)
222:Brian Judd
68:Lądek-Zdrój
788:Categories
617:: 100080.
513:6 November
488:6 November
451:(3): 511.
416:(3): 750.
288:References
257:Bert Broer
183:lanthanide
168:lanthanide
41:rare-earth
714:0021-9606
550:105828989
410:Phys. Rev
133:λ
111:λ
107:Ω
246:See also
60:and the
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418:Bibcode
379:Bibcode
211:Author
125:(where
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214:Title
198:ions.
89:Theory
72:Poland
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239:1962
228:1962
217:Year
37:shell
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353:2015
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