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

页码：477 / 480

页数：4