（76）锗双β衰变Q值的测定。

Determination of the (76)Ge double beta decay Q value.

作者信息

Douysset G, Fritioff T, Carlberg C, Bergström I, Björkhage M

机构信息

Atomic Physics, Stockholm University, Frescativägen 24, S-10405 Stockholm, Sweden.

出版信息

Phys Rev Lett. 2001 May 7;86(19):4259-62. doi: 10.1103/PhysRevLett.86.4259.

DOI:10.1103/PhysRevLett.86.4259

PMID:11328149

Abstract

The Q value of the (76)Ge double beta decay has been determined by measuring the masses of (76)Ge and (76)Se in a Penning trap using neon- and fluorinelike ions. The obtained masses are 75.921 402 758(96) u and 75.919 213 795(81) u, respectively. The systematic errors of these two determinations are nearly equal, and therefore, the remaining systematic uncertainty of the Q value is drastically reduced. A Q value of 2 039.006(50) keV was obtained improving the accuracy of the accepted value by a factor of 6.

摘要

通过在潘宁阱中使用类氖离子和类氟离子测量(^{76}Ge)和(^{76}Se)的质量，确定了(^{76}Ge)双β衰变的Q值。得到的质量分别为(75.921402758(96)u)和(75.919213795(81)u)。这两次测量的系统误差几乎相等，因此，Q值剩余的系统不确定度大幅降低。得到的Q值为(2039.006(50)keV)，将公认值的精度提高了6倍。