Electron traps related to oxygen vacancies in PbWO.sub.4./sub..

0134241 - FZU-D 20030136 RIV US eng J - Journal Article
Laguta, V. V. - Martini, M. - Vedda, A. - Rosetta, E. - Nikl, Martin - Mihóková, Eva - Rosa, Jan - Usuki, Y.
Electron traps related to oxygen vacancies in PbWO₄.
Physical Review. B. Roč. 67, č. 20 (2003), s. 205102-1 - 205102-8. ISSN 0163-1829
R&D Projects: GA ČR GA202/01/0753
Institutional research plan: CEZ:AV0Z1010914
Keywords : PbWO₄ * electron traps * EPR * thermoluminescence * scintillators
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.962, year: 2003

Four types of electron traps in PbWO₄, based on regular W sites perturbed by oxygen vacancies, are identified by ESR. The analysis of the ESR spectra parameters shows that the revealed centers are (WO₃)^- vacancy-containing complex anions associated with a defect in the Pb sublattice:(WO₃)^--A_Pb complexes. Two of centers are thermally stable up to 350-370K, while the order are stable only up to 270-290 K.
Permanent Link: http://hdl.handle.net/11104/0032155