Optical Absorption and Thermo luminescence of Manganese-Doped CaF2, Single Crystals Irradiated with X-Rays

被引:18
作者
Agrawal, M. D. [1 ]
Rao, K. V. [1 ]
机构
[1] Indian Inst Technol, Dept Phys, Kharagpur 721302, W Bengal, India
来源
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 1970年 / 3卷 / 01期
关键词
D O I
10.1002/pssa.19700030119
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Optical absorption in the region 220 to 800 nm and thermoluminescence of X-ray-irradiated CaF, single crystals were measured. Similar measurements were also taken on manganese-doped CaF2 crystals (with 0.2, 1, and 5 mol% of manganese content). The thermal bleaching characteristics of colour centres in CaF2:Mn samples have been investigated. Two features are observed in manganese-doped CaF2 crystals after X-ray irradiation (in comparison to X-ray-irradiated CaF2): (i) an enhancement of colorability with increasing Mn content and (ii) formation of a- and (3-bands in CaF2:Mn (1%) and also new absorption bands in CaF2:Mn (5%). A new absorption band at 300 nm obtained in the X-ray-irradiated CaF2:Mn (5%) may probably be connected with Mn centres. The thermoluminescence of CaF2 is considerably affected with manganese doping. An attempt has been made to understand these results.
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页码:153 / 159
页数:7
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