Spin dipole nuclear matrix elements for double beta decay nuclei by charge-exchange reactions

被引：19

作者：

Ejiri, H. ^{[1
]}

Frekers, D. ^{[2
]}

机构：

[1] Osaka Univ, Nucl Phys Res Ctr, Osaka 5670047, Japan

[2] Univ Munster, Inst Nucl Phys, D-48149 Munster, Germany

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2016年 / 43卷 / 11期

关键词：

charge-exchange reaction; spin dipole strength; double beta decay; nuclear matrix element; quenching of axial vector transitions; GAMOW-TELLER STRENGTH; NEUTRINO;

D O I：

10.1088/0954-3899/43/11/11LT01

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Spin dipole (SD) strengths for double beta-decay (DBD) nuclei were studied experimentally for the first time by using measured cross sections of (He-3, t) charge-exchange reactions (CERs). Then SD nuclear matrix elements (NMEs) M-alpha(SD) for low-lying 2(-) states were derived from the experimental SD strengths by referring to the experimental alpha = GT (Gamow-Teller) and alpha = F (Fermi) strengths. They are consistent with the empirical NMEs M (SD) based on the quasi-particle model with the empirical effective SD coupling constant. The CERs are used to evaluate the SD NME, which is associated with one of the major components of the neutrino-less DBD NME.

引用

页数：8

共 40 条

[1] GT strengths studied by (He-3,t) reactions and nuclear matrix elements for double beta decays [J].