The reaction d(alpha,gamma)Li-6 at low energies and the primordial nucleosynthesis of Li-6

被引：32

作者：

Cecil, FE ^{[1
]}

Yan, JS ^{[1
]}

Galovich, CS ^{[1
]}

机构：

[1] UNIV NO COLORADO, DEPT PHYS, GREELEY, CO 80639 USA

来源：

PHYSICAL REVIEW C | 1996年 / 53卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.53.1967

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：

We have searched for the reaction d(alpha,gamma)Li-6 at an alpha-d center-of-mass energy of 53 keV. An upper limit on the reaction S factor is 2.0 x 10(-7) MeV b at the 90% confidence level, corresponding to a limit on the synthesis of Li-6 from a Standard big bang of 0.9% of the present abundance for a total baryon-to-photon ratio 2.86<eta(10)<3.77. Equivalently, the Li-6-to-Li-7 isotopic abundance ratio immediately after a standard big bang is constrained to be less than 0.85%, considerably less than a recent measurement of this ratio in a metal-poor, Population II halo star.

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页码：1967 / 1970

页数：4

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