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μ-介子在He3原子核上的俘获

朱家珍 周光召 彭宏安

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μ-介子在He3原子核上的俘获

朱家珍, 周光召, 彭宏安

MUON CAPTURE IN He3 NUCLEUS

CHU CHIA-CHEN, CHOU KUANO-CHAO, PENG HONG-AN
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  • 本文计算了μ介子在He3核上俘获的几率、末态H3核的角分布和极化。所采用的理论是带有重正化效应(包含弱磁矩及赝标项)的V-A普适弱作用理论。在计算中考虑了μ和He3核在始态有极化及处于不同超精细态上的情况。在计算中假定了He3核的基态是纯S态,这时忽略了由张量力以及其他自旋轨道耦合力引起的其他态。介子交换电流的效应也没有考虑。在以上这两个假定下,我们证明了俘获几率中只包含一个未知的原子核矩阵元,这个矩阵元恰好是原子核密度函数的富氏分量。利用μ介子(或电子)与He3(或H3)原子核的散射可以确定这个未知矩阵元。
    The rate of the muon capture reaction μ-+He3→H3+ v, the angular distributionand the polarization of the final nucleus H3 are calculated basing on the universal V- A coupling with induced pseudoscular term and the weak magnetic current included. A general initial condition with polarized muon and polarized He3 nucleus in different hyperfine states is assumed.The ground state wave function is assumed to be a pure S-state. Thus we neglected the contribution of other states, which may be caused by the presence of tensor force or other velocity dependent forces. Meson exchange current is also neglected. Under these assumptions we have proved that the capture amplitude contains only one unknown nuclear matrix element, which is the Fourier transform of the nuclear density function. To determine this nuclear matrix element by the scattering of electron (or muon) with He3 (H3) nucleus is finally proposed.
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  • 文章访问数:  7146
  • PDF下载量:  475
  • 被引次数: 0
出版历程
  • 收稿日期:  1959-11-30
  • 刊出日期:  1960-01-05

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