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- W1978570729 abstract "Abstract An optical study of a Y 0.99 Pr 0.01 PO 4 single crystal is presented. Measurements of optical absorption, excitation, and emission by selective excitation into 1 D 2 , 3 P 0 and 3 P 1 , at different temperatures between 20 and 295 K, are described. A detailed account of the line assignments is given for absorption in the 4300–23 000 cm −1 spectral range, and for emission in the 6400–23 000 cm −1 range. The lifetimes of the emitting levels are determined. Vibronic sidebands accompanying absorption, emission and excitation spectra are reported. The decay processes of the 3 P 1 , 3 P 0 and 1 D 2 levels are discussed. The aim of this study is a test of the configuration-interaction-assisted crystal field analysis as well as the accurate experimental determination of the energy level scheme. It was reported previously that the introduction of configuration interaction between the ground 4 f 2 configuration with the excited 4 f 6 p configuration always resulted in a decrease (≈50–60%) in the standard deviations between the observed and calculated energy levels. In the present work the 4 f 5 d configuration is included as well. The crystal field is analysed in the theoretical D 2d site symmetry with and without configuration interaction. The results with 4 f 2 , 4 f 2 +4 f 5 d , 4 f 2 +4 f 6 p and 4 f 2 +4 f 5 d +4 f 6 p are given. The calculation on the basis of the 315 (4 f 2 +4 f 5 d +4 f 6 p ) levels gives the best overall standard deviation lowering it by 75% with regard to the calculation on the 91 4 f 2 levels only." @default.
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- W1978570729 date "2002-01-01" @default.
- W1978570729 modified "2023-09-25" @default.
- W1978570729 title "Spectroscopic investigations and configuration-interaction-assisted crystal field analysis of Pr3+ in YPO4 single crystal" @default.
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- W1978570729 doi "https://doi.org/10.1016/s0022-2313(01)00211-3" @default.
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