NEW LIMITS ON THE 17 KEV NEUTRINO

被引：19

作者：

CHEN, M ^{[1
]}

IMEL, DA ^{[1
]}

RADCLIFFE, TJ ^{[1
]}

HENRIKSON, H ^{[1
]}

BOEHM, F ^{[1
]}

机构：

[1] CALTECH,NORMAN BRIDGE LAB PHYS,PASADENA,CA 91125

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.69.3151

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present results of new measurements of the beta spectrum of S-35, using the Caltech double-focusing, iron-free beta spectrometer. Our data show no evidence for a heavy neutrino with a mass between 12 and 22 keV admixed to the usual light neutrino. In particular, we rule out, at the 6sigma level, a 17 keV neutrino admixed at 0.85%, and give an upper limit (90% C.L.) of 0.2% for such a neutrino admixture. To demonstrate that our experiment is sensitive to spectral features such as those from heavy neutrinos we have induced an artificial kink by means of an absorber foil covering part of the source.

引用

页码：3151 / 3154

页数：4

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