标题： 关于A=18-21核的PNC实验的一致性描述 显示英文标题

标题： Toward a Consistent Description of the PNC Experiments in A=18-21 Nuclei

摘要： 实验PNC结果在$^{18}$F，$^{19}$F，$^{21}$Ne以及当前的理论分析之间存在差异。 如果将实验提取的$^{21}$Ne的PNC矩阵元的小极限解释为同位旋标量和同位旋矢量贡献之间的破坏性干涉，那么就很难理解为什么$^{18}$F中的同位旋矢量贡献如此小，而$^{19}$F中的同位旋标量+同位旋矢量贡献却相对较大。 为了理解这种差异的起源，进行了计算的PNC矩阵元的比较。 结果显示，$^{18}$F 和$^{21}$Ne 矩阵元包含来自 3$\hbar \omega$和 4$\hbar \omega$配置的重要贡献，并且 (0+1)$\hbar \omega$计算给出失真的结果。 显示英文摘要

摘要： The experimental PNC results in $^{18}$F, $^{19}$F, $^{21}$Ne and the current theoretical analysis show a discrepancy . If one interprets the small limit of the experimentally extracted PNC matrix element for $^{21}$Ne as a destructive interference between the isoscalar and the isovector contribution, then it is difficult to understand why the isovector contribution in $^{18}$F is so small while the isoscalar + isovector contribution in $^{19}$F is relatively large. In order to understand the origin of this discrepancy a comparison of the calculated PNC matrix elements was performed. It is shown that the $^{18}$F and $^{21}$Ne matrix elements contain important contributions from 3$\hbar \omega$ and 4$\hbar \omega$ configuration and that the (0+1)$\hbar \omega$ calculations give distorted results.