The 76Se Gamow-Teller strength distribution and its importance for stellar electron capture rates

被引：35

作者：

Zhi, Q. ^{[1
,2
]}

Langanke, K. ^{[1
,3
,4
]}

Martinez-Pinedo, G. ^{[1
]}

Nowacki, F. ^{[5
,6
]}

Sieja, K. ^{[5
,6
]}

机构：

[1] GSI Helmholtzzentrum Schwerionenforsch, Darmstadt, Germany

[2] Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang, Peoples R China

[3] Tech Univ Darmstadt, Darmstadt, Germany

[4] Frankfurt Inst Adv Studies, Frankfurt, Germany

[5] Univ Strasbourg, IPHC, F-67037 Strasbourg, France

[6] CNRS, UMR7178, F-67037 Strasbourg, France

来源：

NUCLEAR PHYSICS A | 2011年 / 859卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Beta decay; Electron capture; Core collapse supernova; Shell-model; WEAK INTERACTION RATES; INTERMEDIATE-MASS NUCLEI; SHELL-MODEL CALCULATIONS; MONTE-CARLO; COLLAPSE;

D O I：

10.1016/j.nuclphysa.2011.04.010

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：

Recent theoretical studies predicted that, due to nuclear correlations across the N = 40 shell gap, electron captures on nuclei with proton numbers Z <40 and neutron numbers N > 40 would not be strongly suppressed due to Pauli blocking of Gamow-Teller (GT) transitions. This prediction has recently been confirmed by the experimental determination of the single-particle occupation numbers in Se-76 and by the measurement of the Se-76 GT(+) strength distribution. In this manuscript we derive such occupation numbers and GT(+) distributions within large-scale shell model studies. Based on the same models, we calculate stellar electron capture rates and compare them to those obtained from the experimental GT(+) data. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：172 / 184

页数：13

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