论文信息 - Structure of the f6 Configuration with Application to Rare‐Earth Ions

Structure of the f6 Configuration with Application to Rare‐Earth Ions

Free‐ion energy‐level schemes for the 4f6 and 4f8 configurations of Eu3+, Sm2+, and Tb3+ are given, which have been calculated from energy matrices including interactions among the three highest multiplicities. The values obtained for the parameters are F2 = 401 cm—1, ζ = 1320 cm—1 for Eu3+; F2 = 330 cm—1, ζ = 1050 cm—1 for Sm2+; and F2 = 434 cm—1, ζ = 1705 cm—1 for Tb3+. The wavefunctions and g values for levels to 40 000 cm—1 are tabulated for Eu3+ and Tb3+. Application of the free‐ion wavefunctions to the Stark splitting of EuCl3 and TbCl3 is discussed.

G. S. Ofelt

[1] J. B. Gruber,et al. Evaluation of Electrostatic Energy Levels of f6 , 1961 .

[2] G. Dieke,et al. Energy Levels of Tb3+ in LaCl3 and Other Chlorides , 1963 .

[3] R. E. Trees. Configuration Interaction in Mn II , 1951 .

[4] B. G. Wybourne. Electrostatic Energy Matrices of the f5 and f6 Configurations , 1961 .

[5] B. G. Wybourne. Spin‐Orbit Interactions in fn Electron Configurations , 1961 .

[6] G. Dieke,et al. Fluorescence Spectrum and the Energy Levels of the Sm2+ Ion , 1962 .

[7] B. Judd. An analysis of the fluorescence spectrum of europium ethyl sulphate , 1959 .

[8] I. Lindgren,et al. THEORY OF ZEEMAN EFFECT IN THE GROUND MULTIPLETS OF RARE-EARTH ATOMS , 1961 .

[9] B. G. Wybourne. Structure of fn Configurations. I. Calculation of the Energy Levels , 1962 .

[10] G. Dieke,et al. Emission Spectra of the Doubly and Triply Ionized Rare Earths , 1961 .