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
收藏
页码：172 / 184
页数：13
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