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,
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页码：62 / 71
页数：10
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