论文标题
$^{55,56} $ ni的电荷半径在$ n = 28 $的CA和Ni同位素上显示出令人惊讶的相似行为
Charge radii of $^{55,56}$Ni reveal a surprisingly similar behavior at $N=28$ in Ca and Ni isotopes
论文作者
论文摘要
$^{55,56} $ ni的核电荷半径是通过线性激光光谱测量的。获得的信息完成了电荷半径在双重魔法核的外壳闭合$^{56} $ ni处的行为。尽管$^{56} $ ni Core应该比$^{48} $ ca Core柔软得多，但钙和镍的电荷半径的趋势令人惊讶地相似。非常低的磁矩$μ（^{55} \ mathrm {ni}）= - 1.108（20）\，μ_n$表示跨$ n，z = 28 $ shell差距之间的旋转轨道伴侣之间M1激发的影响。将我们的电荷-radii结果与\ textIt {ab intio}和核密度功能理论计算进行了比较，在理论不确定性中表现出良好的一致性。
Nuclear charge radii of $^{55,56}$Ni were measured by collinear laser spectroscopy. The obtained information completes the behavior of the charge radii at the shell closure of the doubly magic nucleus $^{56}$Ni. The trend of charge radii across the shell closures in calcium and nickel is surprisingly similar despite the fact that the $^{56}$Ni core is supposed to be much softer than the $^{48}$Ca core. The very low magnetic moment $μ(^{55}\mathrm{Ni})=-1.108(20)\,μ_N$ indicates the impact of M1 excitations between spin-orbit partners across the $N,Z=28$ shell gaps. Our charge-radii results are compared to \textit{ab initio} and nuclear density functional theory calculations, showing good agreement within theoretical uncertainties.
