New experimental results on double beta decay of 130Te

被引：92

作者：

Alessandrello, A

Brofferio, C

Cremonesi, O

Fiorini, E

Giuliani, A

Nucciotti, A

Pavan, M

Pessina, G

Pirro, S

Previtali, E

Vanzini, M

Zanotti, L

Bucci, C

Pobes, C

机构：

[1] Univ Milan, Dipartimento Fis G Occhialini, I-20133 Milan, Italy

[2] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[3] Lab Nazl Gran Sasso, I-67010 Assergi, Aquila, Italy

来源：

PHYSICS LETTERS B | 2000年 / 486卷 / 1-2期

关键词：

double beta decay; neutrino mass;

D O I：

10.1016/S0370-2693(00)00747-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

New results are presented of a search for double beta decay of Te isotopes carried out, using the bolometric technique, with an array of 20 natural tellurite crystals with a total cryogenic mass of similar to 6.8 kilograms. The array has been run at a temperature around 10 mK in the Gran Sasso Underground Laboratory. No evidence has been found for neutrinoless double beta decay of Te-128 and Te-130 and upper limits of 8.6 x 10(22) and 1.44 x 10(23) years, respectively, have been achieved at the 90% confidence level. From the latter we obtain limits on the lepton non-conserving parameters which are the most restrictive ones in direct experiments after those on Ge-76 according to theoretical calculations. Results on two neutrino and majoron mediated decays are also presented and discussed with respect to those obtained for the same nuclei in geochemical experiments. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：13 / 21

页数：9

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