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arXiv 0901.2670nucl-th
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轻核的弱反应--6 He β衰变作为核弱电流的一个试验事例

Weak reactions with light nuclei - 6He beta-decay as a test case for the nuclear weak current

Doron Gazit, Sergey Vaintraub, Nir Barnea

摘要:

本文给出了~ 6 He β衰变到~ 6Li的基态的微观计算。为此,我们用脉冲近似来描述核弱流。基态波函数由核六体问题的解求得。用J矩阵逆散射势描述核子-核子相互作用,用超球谐方法求解核问题。这种方法导致在过渡矩阵元素中大约每密耳2的数值精度。考虑到介子交换电流对跃迁矩阵元的贡献约为5%,这些结果为准确估计它们的影响铺平了道路。

英文摘要:

We present a microscopic calculation of the 6He beta-decay into the ground state of 6Li. To this end we use the impulse approximation to describe the nuclear weak current. The ground state wave functions are obtained from the solution of the nuclear 6-body problem. The nucleonnucleon interaction is described via the J-matrix inverse scattering potential (JISP), and the nuclear problem is solved using the hyperspherical-harmonics approach. This approach results in numerical accuracy of about 2 per mil in the transition matrix element. Bearing in mind that the contribution of meson-exchange currents to the transition matrix element is about 5%, these results pave the way for accurate estimation of their effect.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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