标题： 生成坐标方法与质子-中子配对涨落及$N=Z$奇-奇核的磁性 显示英文标题

标题： Generator coordinate method with proton--neutron pairing fluctuations and magnetic properties of $N=Z$ odd--odd nuclei

摘要： 配对关联在各种核现象中起着重要作用。 然而，对质子-中子$(pn)$配对的定量理解，特别是标量$pn$配对$(S=1, T=0)$仍然不明确。 为了明确$pn$配对的性质，我们研究了$pn$配对在$M1$转变过程中$N=Z$奇-奇核的作用。 我们开发了一个基于生成坐标方法（GCM）的理论模型，其中使用标量和矢量$pn$-对振幅作为生成坐标。 通过粒子和角动量投影，$pn$-对GCM很好地再现了可精确求解的SO(8)模型中奇-奇核的$M1$转变。 我们将该方法应用于$N=Z$奇-奇核，并发现$B(M1)$的实验值得到了很好的再现。 我们还研究了$B(M1)$对标量配对相互作用强度的敏感性。 显示英文摘要

摘要： Pairing correlations play an important role in a variety of nuclear phenomena. However, a quantitative understanding of proton--neutron $(pn)$ pairing, especially isoscalar $pn$ pairing $(S=1, T=0)$ remains elusive. To clarify the property of $pn$ pairing, we investigate the roles of $pn$ pairing in the $M1$ transition of $N=Z$ odd--odd nuclei. We develop a theoretical model based on the generator coordinate method (GCM) in which the isoscalar and isovector $pn$-pair amplitudes are used as the generator coordinates. Using the particle and the angular-momentum projections, the $pn$-pair GCM well reproduces the $M1$ transition of odd--odd nuclei for the exactly solvable SO(8) model. We apply the method to $N=Z$ odd--odd nuclei and find that the experimental values of $B(M1)$ are well reproduced. We also study the sensitivity of $B(M1)$ to the strength of the isoscalar pairing interaction.