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Electron spin resonance investigation of undoped and Li-doped CdWO.sub.4./sub. scintillator crystals
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SYSNO ASEP 0364035 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Electron spin resonance investigation of undoped and Li-doped CdWO4 scintillator crystals Author(s) Buryi, Maksym (FZU-D) RID, ORCID
Laguta, Valentyn (FZU-D) RID, ORCID
Hybler, Jiří (FZU-D) RID, ORCID, SAI
Nikl, Martin (FZU-D) RID, ORCID, SAI
Rosa, Jan (FZU-D) RIDSource Title Physica Status Solidi B : Basic Solid State Physics. - : Wiley - ISSN 0370-1972
Roč. 248, č. 4 (2011), s. 993-996Number of pages 4 s. Language eng - English Country DE - Germany Keywords defects ; electron spin resonance ; scintillators ; wolframite Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects IAA100100810 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000288856300037 DOI 10.1002/pssb.201046099 Annotation Electron spin resonance spectra were studied in the nominally pure and 0.05% Li-doped single crystals of CdWO4. The measurements revealed the presence of Fe3+ ions in the undoped crystal and Mn2+ ions in the Li-doped crystal with concentrations of about 20-70 ppm. The zero-field splitting parameters are determined with a high precision for both accidental impurities: (i) Fe3+: b0 2 = -0.7567(10) cm-1, b2 2 = - 0.3150(10) cm-1 and (ii) Mn2+: b0 2 = -0.1799 (10) cm-1, b2 2 = 0.1445(20) cm-1. They are in a good agreement with the early data for Mn2+ but differ by about 5% in the case of Fe3+ . We have found that the Li+ doping essentially influences the charge balance in the lattice. The results suggest that the Li doping restores the ionic charges of iron and manganese to 2+, conventional for CdWO4 lattice, diminishing thus their participiation in photoinduced processes. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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