The Landau-Migdal parameters, g′NN and g′NΔ

被引：76

作者：

Suzuki, T ^{[1
]}

Sakai, H

机构：

[1] Fukui Univ, Dept Appl Phys, Fukui 9108507, Japan

[2] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[3] RIKEN, Wako, Saitama 3510198, Japan

来源：

PHYSICS LETTERS B | 1999年 / 455卷 / 1-4期

关键词：

Landau-Migdal parameters; excitation energy and strength of the giant Gamow-Teller state;

D O I：

10.1016/S0370-2693(99)00445-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Landau-Migdal parameters, g''s, for nucleon-nucleon and nucleon-Delta couplings are estimated from recent experimental data on the giant Gamow-Teller state of Nb-90. The observed quenching of the GT strength by 10% provides 0.12 < g'(N Delta) < 0.23 for g'(Delta Delta) < 1.0. Since g'(Delta N) is thus small, the excitation energy is dominated by g'(NN), which is estimated to be about 0.59. The universality ansatz for g"s cannot reproduce the excitation energy and strength simultaneously. The results are obtained ignoring the systematic uncertainties in the experiment which are unknown at present. 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：25 / 29

页数：5

共 15 条

[1] QUENCHING AND HARDENING IN THE TRANSVERSE QUASI-ELASTIC PEAK [J].