Recent results of the IGEX 76Ge double-beta decay experiment

被引:53
|
作者
Aalseth, CE [1 ]
Avignone, FT [1 ]
Brodzinski, RL [1 ]
Cebrian, S [1 ]
Gonzáles, D [1 ]
García, E [1 ]
Hensley, WK [1 ]
Irastorza, IG [1 ]
Kirpichnikov, IV [1 ]
Klimenko, AA [1 ]
Miley, HS [1 ]
Morales, A [1 ]
Morales, J [1 ]
de Solórzano, AR [1 ]
Osetrov, SB [1 ]
Pogosov, VS [1 ]
Puimedón, J [1 ]
Reeves, JH [1 ]
Sarsa, ML [1 ]
Scopel, S [1 ]
Smolnikov, AA [1 ]
Starostin, AS [1 ]
Tamanyan, AG [1 ]
Vasenko, AA [1 ]
Vasiliev, SI [1 ]
Villar, JA [1 ]
机构
[1] Univ S Carolina, Columbia, SC 29208 USA
基金
美国国家科学基金会;
关键词
D O I
10.1134/1.855774
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
The International Germanium Experiment (IGEX) has now analyzed 117 mol yr of data from its isotopically enriched (86% Ge-76) germanium detectors. Applying pulse shape discrimination (PSD) to the more recent data, the lower bound on the half-life for neutrinoless double-beta decay of Ge-76 is deduced: T-1/2(0v) > 1.57 x 10(25) yr (90% C.L.). This corresponds to an upper bound on the Majorana neutrino mass parameter, [m(v)], between 0.33 eV and 1.35 eV depending on the choice of theoretical nuclear matrix elements used in the analysis. (C) 2000 MAIK "Nauka/lnterperiodica".
引用
收藏
页码:1225 / 1228
页数:4
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