Development of low background CsI(Tl) and NaI(Tl) crystals for WIMP search

被引：1
|
作者：
Lee, Hyun Su [1 ]
机构：
[1] Ewha Womans Univ, Dept Phys, Seoul 120750, South Korea
来源：
LOW RADIOACTIVITY TECHNIQUES 2015 (LRT 2015) | 2015年 / 1672卷
关键词：
CsI(Tl); NaI(Tl); WIMP; Dark Matter;
D O I：
10.1063/1.4927984
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have developed low background CsI(Tl) and NaI(Tl) crystals to search for weakly interacting massive particles as well as to verify the origin of the annual modulation signal observed by the DAMA/LIBRA experiment. Extensive studies about the contamination mechanisim of Cs-137 in CsI powder lead to the growth of ultra-low-background CsI(Tl) crystals. Similar approaches for NaI(Tl) crystals have been applied to reduce internal backgrounds to less than 0.5 counts/kg/day/keV. Status and understanding of backgrounds and background reduction in NaI(Tl) crystals will be discussed.
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页数：6
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