Evolution of nuclear charge radii in copper and indium isotopes
Evolution of nuclear charge radii in copper and indium isotopes
复制标题
DOI：
10.1088/1674-1137/ac501a
复制
发表时间：
2021-07
影响因子：
3.6
通讯作者：
R. An;Xiang Jiang;L. Cao;Feng-Shou Zhang
中科院分区：
文献类型：
--
作者：
R. An;Xiang Jiang;L. Cao;Feng-Shou Zhang
由于普遍的壳层效应和奇偶交错（OES），核电荷半径的系统趋势引起了人们的极大兴趣。修正的均方根（rms）电荷半径公式在现象学上解释了中子-质子（np）相关性的形成，在这里首次应用于奇Z铜和铟同位素的研究。将具有 NL3、PK1 和 NL3* 参数集的相对论平均场 (RMF) 模型获得的理论结果与实验数据进行了比较。我们的结果表明，OES 和 82 壳闭合的突变都在核电荷半径中清晰地再现。均方根电荷半径的倒抛物线状行为也可以在两个中子幻数之间得到很好的描述，即铜同位素为 50，铟同位素为 82。这意味着 np 相关性在定量确定沿奇数 Z 同位素链的核电荷半径的精细结构中起着不可或缺的作用。此外，我们的结论几乎不依赖于有效力量。
Systematic trends in nuclear charge radii are of great interest due to universal shell effects and odd-even staggering (OES). The modified root mean square (rms) charge radius formula, which phenomenologically accounts for the formation of neutron-proton (np) correlations, is here applied for the first time to the study of odd-Z copper and indium isotopes. Theoretical results obtained by the relativistic mean field (RMF) model with NL3, PK1 and NL3* parameter sets are compared with experimental data. Our results show that both OES and the abrupt changes across and 82 shell closures are clearly reproduced in nuclear charge radii. The inverted parabolic-like behaviors of rms charge radii can also be described remarkably well between two neutron magic numbers, namely to 50 for copper isotopes and to 82 for indium isotopes. This implies that the np-correlations play an indispensable role in quantitatively determining the fine structures of nuclear charge radii along odd-Z isotopic chains. Also, our conclusions have almost no dependence on the effective forces.