THE XE-136 DOUBLE-BETA-DECAY TRACK EXPERIMENT

被引:15
作者
ARTEMIEV, VA
BRAKCHMAN, EV
IVANOVSKY, MA
KARELIN, AK
KIRICHENKO, VV
KNYAZEV, VM
KOZODAEVA, OM
LUBIMOV, VA
MITIN, AI
NIKOLAEV, VP
TSVETKOVA, TN
ZELDOVICH, OY
机构
[1] Institute of Theoretical and Experimental Physics, Moscow
关键词
D O I
10.1016/0168-9002(91)90797-T
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
A detector for studying the Xe-136 2-beta-decay with a proportional drift chamber of volume V = 13 m3 and operating with 10 kg of Xe-136 is considered. A limit of T1/2(2-beta-0-nu) > 10(23) yr can be reached at the sea level. The investigation of background with a prototype (size (1.0 x 0.8 x 0.4) m3 and Xe-136 mass 0.5 kg) showed that the track information allows a high background-rejection coefficient (> 10(6)). The technique proposed in this article allows the defining of the admixture of Rn-222 in the working gas at a level of 10(-20)-10(-21) atom/atom. A half-life limit of T1/2(2-beta-2-nu) > 2 x 10(19) yr (90% CL) was obtained.
引用
收藏
页码:309 / 322
页数:14
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