Nuclear emulsions for dark matter detection

被引：3
|
作者：
Tani, Tadaaki [1 ]
Naka, Tatsuhiro [2 ]
机构：
[1] Soc Photogr Imaging Jpn, 2933-2 Yoshidajima, Kaisei, Kanagawa 2580021, Japan
[2] Nagoya Univ, Ctr Expt Studies, Kobayashi Masukawa Inst Origin Particles & Univer, Chigusa Ku, Furou Cho, Nagoya, Aichi 4648602, Japan
来源：
RADIATION MEASUREMENTS | 2016年 / 95卷
关键词：
Dark matter detection; Lindhard-Scharff theory; Electron-hole pair creation; Nuclear emulsion; Silver halide grain; Photographic sensitivity; SILVER BROMIDE GRAINS; LATENT-IMAGE; SENSITIZATION; CLUSTERS; CENTERS; LIGHT;
D O I：
10.1016/j.radmeas.2016.10.004
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
On silver halide (AgX) emulsion grains (similar to 200 nm in diameter) for neutrino detection in OPERA project, a latent image center composed of a cluster of >= 4 Ag atoms is formed with similar to 18 electron-hole pairs by current photographic process in each grain. According to the analysis in this paper, AgX emulsion grains (similar to 40 nm) for dark matter detection should behave quite differently, forming a latent image center under such extraordinary condition that as many as similar to 1000 electrons and surplus positive holes are created for similar to 10 femtoseconds (fs) in each grain, causing violent recombination and re-halogenation of Ag clusters. Therefore, it is necessary to strongly reduce the recombination and re-halogenation of Ag clusters in the nuclear emulsions for dark matter detection. Further proposals are made on the design of nuclear emulsions for dark matter detection. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：31 / 36
页数：6
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