ANALYSIS OF THE ABSORPTION-SPECTRA 4FN+1-]4FN5D-6S OF RARE-EARTH IONS IN THE CUBIC FIELD .2. EU2+ ION IN ALKALI-EARTH CHALCOGENIDES

被引:30
作者
ASANO, S
NAKAO, Y
机构
[1] Department of Physics, Faculty of Science, Okayama University
来源
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS | 1979年 / 12卷 / 19期
关键词
D O I
10.1088/0022-3719/12/19/026
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
For pt.I see ibid., vol.12, p.4081 (1979). The excitation spectra of MgS:Eu2+ phosphors were measured at 300 and 80K. Two distinct bands assigned to the 8 Gamma 4(t2g) and 8 Gamma 3(eg) bands appear for lower concentrations of Eu2+ ions and in addition, two bands assigned to the 8 Gamma 1(6s) and 6 Gamma 4(t2g) bands are observed for higher concentrations of Eu2+ ions. The shapes of the absorption spectra 4f7 to 4f65d-6s of an Eu 2+ ion in MgS are calculated by using the energy matrix for the 4fN5d-6s configurations and the atomic spectrum data for a free Eu2+ ion. Comparison between the observed and calculated results confirms the band assignment and leads to the determination of some energy parameters.
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页码:4095 / 4108
页数:14
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