Double-beta decay Q values of 116Cd and 130Te

被引：79

作者：

Rahaman, S. ^{[1
]}

Elomaa, V. -V. ^{[1
]}

Eronen, T. ^{[1
]}

Hakala, J. ^{[1
]}

Jokinen, A. ^{[1
]}

Kankainen, A. ^{[1
]}

Rissanen, J. ^{[1
]}

Suhonen, J. ^{[1
]}

Weber, C. ^{[1
]}

Aysto, J. ^{[1
]}

机构：

[1] Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland

来源：

PHYSICS LETTERS B | 2011年 / 703卷 / 04期

基金：

芬兰科学院;

关键词：

Penning trap; Mass Spectrometer; Double-beta decay; Q value; Neutrino mass; PRECISION MASS-SPECTROMETRY; EXCITED FINAL-STATES; PENNING TRAP; RAMSEY METHOD; NUCLEI; ION; SPECTROSCOPY; TRANSITIONS; ELECTRON; PARTICLE;

D O I：

10.1016/j.physletb.2011.07.078

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Q values of the Cd-116 and Te-130 double-beta decaying nuclei were determined by using a Penning trap mass spectrometer. The new atomic mass difference between Cd-116 and Sn-116 of 2813.50(13) key differs by 4.5 key and is 30 times more precise than the previous value of 2809(4) key. The new value for Te-130, 2526.97(23) key is close to the Canadian Penning trap value of 2527.01 +/- 0.32 key (Scielzo et al., 2009) [1], but differs from the Florida State University trap value of 2527.518 +/- 0.013 key (Redshaw et al., 2009) [2] by 0.55 keV (2 sigma). These values are sufficiently precise for ongoing neutrinoless double-beta decay searches in Cd-116 and Te-130. Hence, our Q values were used to compute accurate phase-space integrals for these double-beta decay nuclei. In addition, experimental two-neutrino double-beta decay nuclear matrix elements were determined and compared with the theoretical values. The neutrinoless double-beta decay half-lives for these nuclei were estimated using our precise phase-space integrals and considering the range of the best available matrix elements values. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：412 / 416

页数：5

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