Low-energy M1 strength in the Li-7(p,gamma o)Be-8 reaction

被引：8

作者：

Csoto, A ^{[1
]}

Karataglidis, S ^{[1
]}

机构：

[1] LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545

来源：

NUCLEAR PHYSICS A | 1996年 / 607卷 / 01期

关键词：

Li-7(p; gamma o)Be-8; solar neutrinos; cluster model; shell model;

D O I：

10.1016/0375-9474(96)00229-1

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：

The Li-7(p, gamma 0)Be-8 reaction is studied in a microscopic cluster model. All relevant subsystem properties are well reproduced. The calculated astrophysical S-factor is in good agreement with the experimental data, although some M1 strength is missing in the 1(+); 1 resonance region, and there is no contribution from the 1(+);0 stare. Our model predicts, in contradiction to experiment, a dominant I = 1 channel spin contribution to the cross section. We estimate an M1 strength of 3.5% at 80 keV. By assuming the experimental resonance parameters and channel spin ratio for the first 1(+) state that M1 strength is 6.3%, in good agreement with an R-matrix analysis,

引用

页码：62 / 71

页数：10

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