用镜像对核的电荷半径差约束张量力项
Constraining tensor force terms with the charge radii difference of mirror-pair nuclei
- Ningxia University（宁夏大学）
- Beijing Normal University（北京师范大学）
- Guangxi Normal University（广西师范大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本研究利用近球形镜像对核的电荷半径差，结合磁偶极激发等数据，约束了Skyrme相互作用的张量项强度，为确定张量力大小提供了新途径。
AI中文摘要：
镜像配对核的电荷半径差是确定非对称核物质中相互作用组分的替代探针。本工作利用近球形镜像对核⁵⁴Ni-⁵⁴Fe和³⁶Ca-³⁶S的电荷半径差，约束Skyrme相互作用中张量项的大小。计算结果表明，镜像配对核的电荷半径差与所采用的三重态奇张量分量、三重态偶张量分量的强度之间存在线性关联；此外，镜像配对核的电荷半径差对三重态奇参数U的强度比三重态偶参数T的强度更敏感。结合从磁偶极（M1）激发、电荷交换伽莫夫-泰勒（GT）态及自旋偶极（SD）激发得到的三重态偶张量部分的定量约束强度，进一步约束了SLy5和SGII有效相互作用的三重态奇强度，为约束张量力的合适大小提供了替代方法。
英文摘要：
Charge radii differences of mirror partner nuclei provide an alternative probe to pin down the interaction components in asymmetric nuclear matter. In this work, the differences in the charge radii of almost spherical mirror-paired nuclei $^{54}$Ni-$^{54}$Fe and $^{36}$Ca-$^{36}$S are used to constrain the magnitude of tensor terms in the Skyrme interactions. The calculated results suggest that a linear correlation can be found between the difference of charge radii of mirror partner nuclei and the adopted strengths of the triplet-odd and triplet-even tensor components. Besides, it suggests that charge radii differences of mirror-paired nuclei are more sensitive to the adopted strengths of the triplet-odd parameter $U$ rather than the triplet-even parameter $T$. Combining the quantitative constraint strengths of the triplet-even tensor part obtained from the magnetic dipole (M1) excitations, the charge-exchange Gamow-Teller (GT) states, and the spin-dipole (SD) excitations, the triplet-odd strengths are further constrained for the SLy5 as well as SGII effective interactions. This provides an alternative approach to constrain the appropriate magnitude of tensor force.
