EPR characterization of Mn2+ impurity ions in PbWO4 single crystals

被引：10
|
作者：
Nistor, SV
Stefan, M
Goovaerts, E
Nikl, M
Bohacek, P
机构：
[1] Natl Inst Mat Phys, RO-077125 Bucharest, Romania
[2] Univ Antwerp, Dept Phys, B-2610 Antwerp, Belgium
[3] Acad Sci Czech Republ, Inst Phys, Prague 16200 6, Czech Republic
来源：
RADIATION MEASUREMENTS | 2004年 / 38卷 / 4-6期
关键词：
electron paramagnetic resonance; PbWO4; Mn2+; scintillator;
D O I：
10.1016/j.radmeas.2003.12.024
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The electron paramagnetic resonance (EPR) properties of the Mn2+ ions in PbWO4 single crystals grown by the Czochralski method have been investigated in the X-band microwave frequency, at T = 20 K. The angular dependence of the EPR line positions obtained by rotating the magnetic field in the main crystallographic planes shows that the local symmetry at the Mn2+ impurity ions is tetragonal, strongly suggesting that the Mn2+ ions substitute for the Pb2+ lattice cations, without charge compensation. The resulting spin Hamiltonian parameters compare well with the corresponding values for the Mn2+ ions in other isomorphous tungstates. The observed strong angular variation of the EPR linewidth has been quantitatively described considering a random distribution of lattice strains. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码：655 / 658
页数：4
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