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

来源：

NUCLEAR PHYSICS A | 2002年 / 700卷 / 1-2期

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

页码：17 / 24

页数：8

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