Afterglow Suppression by Codoping with Bi in CsI:Tl Crystal Scintillator

被引：32
|
作者：
Totsuka, Daisuke [1 ,3 ]
Yanagida, Takayuki [2 ]
Fujimoto, Yutaka [3 ]
Yokota, Yuui [3 ]
Moretti, Federico [4 ]
Vedda, Anna [4 ]
Yoshikawa, Akira [2 ,3 ]
机构：
[1] Nihon Kessho Kogaku Co Ltd, Gunma, Japan
[2] New Ind Creat Hatchery Ctr NICHe, Sendai, Miyagi 9808579, Japan
[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[4] Univ Milano Bicocca, Dept Mat Sci, I-20125 Milan, Italy
来源：
APPLIED PHYSICS EXPRESS | 2012年 / 5卷 / 05期
基金：
日本学术振兴会;
关键词：
TL CRYSTALS; RADIOLUMINESCENCE;
D O I：
10.1143/APEX.5.052601
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Single crystals of CsI, CsI:Tl, and CsI:Tl, Bi were grown by the vertical Bridgman method. We studied the effect of Bi3+ codoping on the CsI:Tl X-ray-induced afterglow. Thermally stimulated luminescence measurements were carried out in order to investigate the role of traps. The results showed a remarkable reduction of afterglow, of about an order of magnitude, and of trap concentration by Bi codoping. These improvements could be related to a possible role of Bi in the compensation of intrinsic nonstoichiometry defects. (c) 2012 The Japan Society of Applied Physics
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页数：3
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