Search for β- and β-β- decays of 48Ca

被引:13
|
作者
Bakalyarov, A
Balysh, A
Barabash, A
Briançon, C
Brudanin, V
Egorov, V
Hubert, F
Hubert, P
Kovalik, A
Lebedev, VI
Rukhadze, NI [1 ]
Stekl, I
Umatov, V
Vylov, T
机构
[1] Joint Inst Nucl Res, Dubna 141980, Russia
[2] CNRS, IN2P3, Ctr Spectrometrie Nucl & Spectrometrie Masse, F-91405 Orsay, France
[3] Univ Paris 11, F-91405 Orsay, France
[4] Inst Theoret & Expt Phys, Moscow 117259, Russia
[5] RRC Kurchatov Inst, Moscow 123182, Russia
[6] CNRS, IN2P3, Ctr Etud Nucl, F-33175 Gradignan, France
[7] Univ Bordeaux, F-33175 Gradignan, France
[8] Czech Tech Univ, Fac Nucl Sci & Phys Engn, CR-11519 Prague, Czech Republic
基金
俄罗斯基础研究基金会;
关键词
Ca-48; beta decay; 2 beta decay; measured T-1/2 lower limits;
D O I
10.1016/S0375-9474(01)01306-9
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
A (CaCO3)-Ca-48 powder sample containing 20.18 g of Ca-48 was measured for 797 h with a 400 cm(3) low-background HPGe detector. New limits on decays of 48Ca were obtained. For single beta transitions to (SC)-S-48 the limits are equal to 0.71 x 10(20) y, 1.1 (X) 10(20) y, and 0.82 x 10(20) y for transitions to the ground state, excited 5(+) and 4(+) states, respectively. The new limits on double beta decay to excited states of Ti-48 are equal to 0.47 x 10(20) y, 1.1 x 10(20) y, and 0.90 x 10(20) y for transitions to the first 2(+), second 2(+) and first 0(+) excited states, respectively. All limits are given at the 90% CL. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:17 / 24
页数:8
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