Search for neutrinoless double beta decay with enriched 76Ge in Gran Sasso 1990-2003

被引：491

作者：

Klapdor-Kleingrothaus, HV ^{[1
]}

Krivosheina, IV ^{[1
]}

Dietz, A ^{[1
]}

Chkvorets, O ^{[1
]}

机构：

[1] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

来源：

PHYSICS LETTERS B | 2004年 / 586卷 / 3-4期

关键词：

D O I：

10.1016/j.physletb.2004.02.025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The results of the HEIDELBERG-MOSCOW experiment which searches with 11 kg of enriched 76Ge for double beta decay in the Gran Sasso underground laboratory are presented for the full running period August 1990-May 2003. The duty cycle of the experiment was ∼80%, the collected statistics is 71.7 kgyr. The background achieved in the energy region of the Q value for double beta decay is 0.11 eventskg-1yr-1 keV-1. The two-neutrino accompanied half-life is determined on the basis of more than 100000 events. The confidence level for the neutrinoless signal has been improved to 4.2σ. © 2004 Elsevier B.V. All rights reserved.

引用

页码：198 / 212

页数：15

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