A SEARCH FOR NEUTRINOLESS DOUBLE BETA-DECAY OF TE-130 WITH A THERMAL DETECTOR

被引：39

作者：

ALESSANDRELLO, A

BROFFERIO, C

CAMIN, DV

CREMONESI, O

FIORINI, E

GERVASIO, G

GIULIANI, A

PAVAN, M

PESSINA, G

PREVITALI, E

ZANOTTI, L

机构：

[1] IST NAZL FIS NUCL,SEZ MILANO,I-20133 MILAN,ITALY

[2] LAB NAZL GRAN SASSO,I-67010 ASSERGI,ITALY

来源：

PHYSICS LETTERS B | 1992年 / 285卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(92)91319-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A 73.1 g TeO2 bolometric detector has been operating for more than two months at about 16 mK in a specially constructed low activity dilution refrigerator installed in the Gran Sasso Underground Laboratory and shielded against environmental radioactivity. Its energy resolution is comparable with that of a Ge diode. A spectrum of the thermal pulses collected in 1389 h of effective running time shows no evidence for neutrinoless double beta decay of Te-130. The corresponding lower limit of the lifetime is three orders of magnitude more stringent than those obtained for the same nucleus with conventional techniques. It also exceeds the value for the inclusive (two neutrino and neutrinoless) lifetime obtained by geochemical searches. Double beta decay of Te-130 has therefore to be attributed mainly to the two neutrino channel.

引用

页码：176 / 182

页数：7

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