Hole capture in PbWO4:Mo,La(Y) scintillator crystals

被引：22
|
作者：
Laguta, V. V. [1 ]
Buryi, M. [1 ]
Nikl, M. [1 ]
Rosa, J. [1 ]
Zazubovich, S. [2 ]
机构：
[1] Inst Phys AS CR, Prague 16253, Czech Republic
[2] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia
来源：
PHYSICAL REVIEW B | 2011年 / 83卷 / 09期
关键词：
LEAD TUNGSTATE CRYSTALS; LUMINESCENCE; PBWO4; RESONANCE;
D O I：
10.1103/PhysRevB.83.094123
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The processes of hole localization in PbWO4:Mo,La(Y) single crystals were investigated by electron spin resonance. It was found that the holes created by uv irradiation are trapped at the regular oxygen ions in the vicinity of perturbing defects such as lead vacancies, impurity ions (La, Y), and other lattice imperfections. This leads to a variety of O- centers which differ in both the thermal stability (from about 160 K up to 240 K) and spectroscopic parameters. The thermal release of such trapped holes and their subsequent recombination with electrons stored at different traps, including (MoO4)(3-) complexes, are accompanied by the appearance of the thermally stimulated luminescence peaks located at around 190 K and in the 225-250 K range.
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页数：5
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