کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9575703 | 1504351 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Absorption spectrum and crystal-field analysis of U4+ ions in CsCdBr3 single crystals
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Absorption spectrum and crystal-field analysis of U4+ ions in CsCdBr3 single crystals Absorption spectrum and crystal-field analysis of U4+ ions in CsCdBr3 single crystals](/preview/png/9575703.png)
چکیده انگلیسی
Single crystals of U4+:CsCdBr3 were grown by the Bridgman-Stockbarger technique. It has been assumed, that U4+ ions are substituting two Cd2+ ions and possess the C3v site symmetry. Thirty seven energy levels, located between 4000 and 25,000 cmâ1 and encompassing all but the 1S0 multiplet, were assigned from 7 K absorption spectra. The symmetry of the levels were determined on the basis of the observed small splitting of the Î3 doublets as well as by a comparison of low temperature absorption spectra of the U4+:CsCdBr3 with that previously reported for U4+ in Cs2UBr6 and Cs2ZrBr6 single crystals. A crystal-field analysis was performed by fitting eight atomic (in the orthogonal formalism) and 6 crystal-field parameters to the experimental Stark levels with an r.m.s. deviation of 100 cmâ1. The obtained values of the Hamiltonian parameters are discussed and compared with those reported in previous analyses of U4+ ions. The relatively strong crystal field, resulting in Nv = 8530 cmâ1 proves that in the CsCdBr3 crystals the U4+ ions are located at a high symmetry site.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 308, Issues 1â2, 10 January 2005, Pages 135-145
Journal: Chemical Physics - Volume 308, Issues 1â2, 10 January 2005, Pages 135-145
نویسندگان
M. Karbowiak, A. Mech, J. DrożdżyÅski,