论文标题
通过$^{46-48} $ ar检查$ n $ = 28壳封闭
Examining the $N$ = 28 shell closure through high-precision mass measurements of $^{46-48}$Ar
论文作者
论文摘要
$ n $ = 28个魔术在中子富的氩同位素中的强度通过$^{46-48} $ ar进行的高精度质量测量检查，并在Isolde/Cern的IselTrap质谱仪中执行。新的质量值的精确度是以前的测量值的90倍。尽管他们暗示了$ n $ = 28壳的持续性，但我们表明，根据\ emph {sdpf-u}现象学壳模型模型相互作用进行的大量光谱数据和理论研究，这一结论必须细微差别。我们的结果也与\ emph {ab intib}进行了将价值空间内相似性重新归一化组和自洽的绿色功能方法进行比较。两种计算都很好地说明了质量系统学的及$ z $ = 18及其左右，并且通常对该地区的物理学进行一致的描述。该组合分析表明$^{46} $ ar是封闭壳$^{48} $ CA与集体$^{44} $ s之间的过渡。
The strength of the $N$ = 28 magic number in neutron-rich argon isotopes is examined through high-precision mass measurements of $^{46-48}$Ar, performed with the ISOLTRAP mass spectrometer at ISOLDE/CERN. The new mass values are up to 90 times more precise than previous measurements. While they suggest the persistence of the $N$ = 28 shell closure for argon, we show that this conclusion has to be nuanced in light of the wealth of spectroscopic data and theoretical investigations performed with the \emph{SDPF-U} phenomenological shell model interaction. Our results are also compared with \emph{ab initio} calculations using the Valence Space In-Medium Similarity Renormalization Group and the Self-Consistent Green's Function approaches. Both calculations provide a very good account of mass systematics at and around $Z$ = 18 and, generally, a consistent description of the physics in this region. This combined analysis indicates that $^{46}$Ar is the transition between the closed-shell $^{48}$Ca and collective $^{44}$S.
