ANOMALOUS STRUCTURE IN THE BETA-DECAY OF GASEOUS MOLECULAR TRITIUM

被引：119

作者：

STOEFFL, W

DECMAN, DJ

机构：

[1] Lawrence Livermore National Laboratory, Livermore

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.75.3237

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have made high statistics measurements of tritium beta decay to set a limit on the mass of the election antineutrino. The measurements used a windowless gaseous source of molecular tritium and a high resolution toroidal field magnetic spectrometer. We calibrate the system using conversion electrons from the decay of Kr-83m. The best fit value for the neutrino mass squared is significantly negative. An anomalous structure in the beta decay spectrum in the last 55 eV closest to the end point causes this result.

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页码：3237 / 3240

页数：4

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