Dynamics of radio-photoluminescence and thermally-stimulated luminescence in KBr:Sm

被引：21
|
作者：
Okada, Go [1 ]
Fujimoto, Yutaka [2 ]
Tanaka, Hironori [2 ]
Kasap, Safa [3 ]
Yanagida, Takayuki [1 ]
机构：
[1] Nara Inst Sci & Technol NAIST, Grad Sch Mat Sci, 8916-5 Takayama, Nara 6300192, Japan
[2] Tohoku Univ, Grad Sch Engn, Dept Appl Chem, Aoba Ku, 6-6-07 Aoba, Sendai, Miyagi 9808579, Japan
[3] Univ Saskatchewan, Dept Elect & Comp Engn, 57 Campus Dr, Saskatoon, SK S7N 5A9, Canada
来源：
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2017年 / 28卷 / 21期
基金：
日本科学技术振兴机构;
关键词：
ACTIVATED PHOSPHATE-GLASS; CRYSTALS; DOSIMETRY; SILVER; SM;
D O I：
10.1007/s10854-017-7496-z
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Sm-doped KBr single crystals were prepared by the Bridgman-Stockbarger technique. The samples show both radio-photoluminescence (RPL) and thermally-stimulated luminescence (TSL). The RPL is due to the valence change of the Sm ion (Sm3+ -> Sm2+), induced by X-rays, so the photoluminescence emission by Sm2+ appears as a result of irradiation and the intensity increases with the irradiation dose. The emission of Sm2+ is due to the 5d-4f transitions. The RPL response seems to be related with the thermally-stimulated luminescence (TSL) on the same samples. The TSL emission is predominantly due to Sm2+, instead of Sm3+, indicating that capture of a hole by Sm2+ takes place. As a result of TSL (or heat treatment), Sm2+ reverts to Sm3+ as the original state. The thermal activation energies have been derived from TSL isothermal analyses, and the obtained values are 1.42, 1.55, 1.65, and 1.74 eV.
引用
收藏
页码：15980 / 15986
页数：7
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