NEW LIMIT ON NEUTRINOLESS DOUBLE BETA-DECAY IN XE-136 WITH A TIME PROJECTION CHAMBER

被引：27

作者：

WONG, HT

BOEHM, F

FISHER, P

GABATHULER, K

HENRIKSON, HE

IMEL, DA

IQBAL, MZ

JORGENS, V

MITCHELL, LW

OCALLAGHANHAY, BM

THOMAS, J

TREICHEL, M

VUILLEUMIER, JC

VUILLEUMIER, JL

机构：

[1] PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND

[2] INST PHYS, CH-2000 NEUCHATEL, SWITZERLAND

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.67.1218

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A xenon time projection chamber with an active volume of 207 L has been built to study neutrinoless double beta-decay in Xe-136. Data were taken in the Gotthard Underground Laboratory, with 5 atm of xenon enriched to 62.5% in Xe-136. From 3380 h of data, no evidence has been found for the 0v 0+ --> 0+ transition. Half-life limits of T1/2(0v) > 2.5(4.9) x 10(23) yr in the mass-mechanism mode and T1/2(0v) > 1.7 (3.2) x 10(23) yr in the right-handed-current mode, at the 90(68)% C.L., were derived. An upper limit for the Majorana neutrino mass parameter was deduced.

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页码：1218 / 1221

页数：4

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