Judd–Ofelt theory

Judd–Ofelt theory is a theory in physical chemistry describing the intensity of electron transitions within the 4f shell of rare-earth ions in solids and solutions.[1][2][3]

The theory was introduced independently in 1962 by Brian R. Judd of the University of California, Berkeley, and PhD candidate George S. Ofelt at Johns Hopkins University.[2] Their work was published in Physical Review and the Journal of Chemical Physics, respectively.[4][5] Judd and Ofelt did not meet until 2003 at a workshop in Lądek-Zdrój, Poland.[1]

Judd and Ofelt's work was cited approximately 2000 times between 1962 and 2004.[1] Brian M. Walsh of NASA Langley places Judd and Ofelt's theory at the "forefront" of a 1960s revolution in spectroscopic research on rare-earth ions.[2]

Application software

Judd–Ofelt intensity parameters from absorption spectrum of any lanthanide can be calculated by the RELIC application software.[3] 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 Eu3+ doped compounds, can be obtained by the JOES application software.[6][7]

Bibliography of the research by Judd and Ofelt supporting the theory
Author Title Year
Brian Judd Optical Absorption Intensities of Rare-Earth Ions[8] 1962
George S. Olfelt Intensities of Crystal Spectra of Rare-Earth Ions[9] 1962

See also

References
  1. Walsh, Brian M. (June 2005). Judd–Ofelt Theory: Principles and Practices (slideshow). The International School of Atomic and Molecular Spectroscopy. Erice, Italy. Retrieved 18 November 2015.
  2. Walsh, Brian M. "Chapter 21: Judd-Ofelt theory: Principles and practices". In Di Bartolo, B.; Forte, O. (eds.). Advances in Spectroscopy for Lasers and Sensing. Springer Netherlands. pp. 403–433. Retrieved 18 November 2015.
  3. 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". Journal of Luminescence. 136: 221–239. Bibcode:2013JLum..136..221H. doi:10.1016/j.jlumin.2012.10.035.
  4. Judd, B. R. (1962). "Optical Absorption Intensities of Rare-Earth Ions". Phys. Rev. 127 (3): 750. Bibcode:1962PhRv..127..750J. doi:10.1103/PhysRev.127.750.
  5. Ofelt, G. S. (1962). "Intensities of Crystal Spectra of Rare-Earth Ions". J. Chem. Phys. 37 (3): 511. Bibcode:1962JChPh..37..511O. doi:10.1063/1.1701366.
  6. Ćirić, Aleksandar; Stojadinović, Stevan; Sekulić, Milica; Dramićanin, Miroslav D. (January 2019). "JOES: An application software for Judd-Ofelt analysis from Eu3+ emission spectra". Journal of Luminescence. 205: 351–356. doi:10.1016/j.jlumin.2018.09.048. S2CID 105828989.
  7. "JOES – Judd-Ofelt from emission spectrum Software – OMAS Group".
  8. Judd, B. R. (1962). "OPTICAL ABSORPTION INTENSITIES OF RARE-EARTH IONS". {{cite journal}}: Cite journal requires |journal= (help)
  9. Ofelt, G. S. (1 August 1962). "Intensities of Crystal Spectra of Rare-Earth Ions". Journal of Chemical Physics. 37: 511–520. doi:10.1063/1.1701366. ISSN 0021-9606.


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