Spectrum analysis of U3+-doped LaBr3 single crystals. Part 1: crystal-field analysis
| Autor: | Janusz Drożdżyński, Mirosław Karbowiak, Marcin Sobczyk |
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| Rok vydání: | 2005 |
| Předmět: |
Absorption spectroscopy
Chemistry Doping Mineralogy Condensed Matter Physics Polarization (waves) Molecular physics Spectral line Electronic Optical and Magnetic Materials Ion Inorganic Chemistry Crystal symbols.namesake Materials Chemistry Ceramics and Composites symbols Physical and Theoretical Chemistry Spectrum analysis Hamiltonian (quantum mechanics) |
| Zdroj: | Journal of Solid State Chemistry. 178:536-544 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2004.10.024 |
| Popis: | Single crystals of U3+:LaBr3 were grown by the Bridgman–Stockbarger technique. High-resolution polarized absorption spectra of the crystals were recorded at 4.2 K in the 4000–50,000 cm−1 range. Sixty-four experimental crystal-field energy levels of the U3+ ion were fitted to a semiempirical Hamiltonian employing free-ion, one-electron crystal-field as well as two-particle correlation crystal-field (CCF) operators with an r.m.s. deviation of 28 cm−1. The performed analysis of the spectra enabled the determination of crystal-field parameters and assignment of the observed 5f3→5f3 transitions. The effects of selected CCF operators on the splitting of some specific U3+ multiplets have been investigated and the obtained values of Hamiltonian parameters are discussed and compared with those reported in previous analyses. |
| Databáze: | OpenAIRE |
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