中子滴线附近富中子核半径和中子皮厚的研究

U. Rahaman, M. Ikram, M. Imran, A. A. Usmani
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引用次数: 0

摘要

我们研究了从c到Zr的同位素链上的电荷半径($r_{c}$)、中子半径($r_n$)和中子皮厚($\Delta r=r_n-r_p$)以及稳定区到中子滴谱线。利用具有有效非线性NL3和NL3*相互作用的轴向变形自洽相对论平均场理论(RMF)进行理论计算。将理论估计值与现有的实验数据进行了比较,发现两者具有合理的一致性。我们还评估了双中子分离能($S_{2n}$)来标记所考虑的同位素系列的滴线核。在S_{2n}$的参考文献中,也讨论了中子的奇异性。将计算的中子半径与r=r_0N^{1/3}$的经验估算值进行了比较,探讨了中子滴线核半径的异常趋势。为了指导长尾,分析了几种候选皮肤的密度分布。最后,对所考虑的整个同位素系列的中子蒙皮厚度进行了观测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A study of nuclear radii and neutron skin thickness of neutron-rich nuclei near the neutron drip line
We studied the charge radius ($r_{c}$), neutron radius ($r_n$), and neutron skin-thickness ($\Delta r=r_n-r_p$) over a chain of isotopes from C to Zr with the stable region to the neutron drip line. Theoretical calculations are done with axially deformed self-consistent relativistic mean-field theory (RMF) with effective nonlinear NL3 and NL3* interactions. The theoretically estimated values are compared with available experimental data and a reasonable agreement are noted. We additionally assessed the two-neutron separation energy ($S_{2n}$) to mark the drip line nuclei of the considered isotopic series. In the reference of $S_{2n}$, neutron magicity is also discussed. The calculated neutron radii are compared with empirical estimation made by $r=r_0N^{1/3}$ to examine the abnormal trend of the radius for neutron drip line nuclei. In view to guide the long tails, the density distribution for some skin candidates is analyzed. Finally, neutron skin thickness is observed for the whole considered isotopic series.
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