ESR of W5+-H centers in gamma-irradiated ZnWO4 single crystals doped by Li

被引：14
|
作者：
Watterich, A
Gilliam, OR
Kappers, LA
Raksanyi, K
机构：
[1] UNIV CONNECTICUT,DEPT PHYS,STORRS,CT 06269
[2] UNIV CONNECTICUT,INST MAT SCI,STORRS,CT 06269
来源：
SOLID STATE COMMUNICATIONS | 1996年 / 97卷 / 06期
基金：
美国国家科学基金会;
关键词：
insulators; point defects; radiation effects; electron paramagnetic resonance;
D O I：
10.1016/0038-1098(95)00680-X
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Gamma or UV (254 nm) irradiation of an ''as-received'' ZnWO4:Li crystal, or, UV (366 nm) bleaching of a reduced crystal, produces a W5+ paramagnetic defect for irradiation at 77 K. The ESR spectra indicate Ct symmetry for this center. It is characterized by a strong W-183 hyperfine interaction as well as weaker W-183, H-1 and Zn-67 superhyperfine interactions, permitting the development of a defect model. The defect is designated as the W5+-H center. It is related to a Mo impurity center reported in reduced ZnWO4 crystals, although both its production and stability are different.
引用
收藏
页码：477 / 480
页数：4
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