AI 中文总结
针对富中子核$^{140}$Sn壳层封闭理论结果冲突的问题，采用手征有效场理论的核相互作用进行从头计算，验证该相互作用对$^{133}$Sn低能态的再现情况，计算$^{140}$Sn第一激发$2^+$态能量，发现与假设矛盾。
AI 中文摘要
关于富中子核$^{140}$Sn中是否存在壳层封闭，理论结果相互矛盾。我们通过从头计算来解决这一争议，使用手征有效场理论的核相互作用，该理论能准确再现和预测双幻核的低能态。我们验证了这种相互作用能准确再现$^{133}$Sn的低能态。假设$^{140}$Sn在$^{132}$Sn之后有一个封闭的$7/2^-$中子子壳层，并计算其第一激发$2^+$态，结果能量很小且与假设矛盾。
英文摘要
There are conflicting theoretical results about the presence of a shell closure in the neutron-rich nucleus $^{140}$Sn. We address this controversy by performing ab initio computations, using a nuclear interaction from chiral effective field theory that accurately reproduced and predicted low-lying states in doubly magic nuclei. We verify that this interaction accurately reproduces low-lying states in $^{133}$Sn. We assume that $^{140}$Sn exhibits a closed $7/2^-$ neutron subshell beyond $^{132}$Sn and compute its first excited $2^+$ state. The resulting energy is small and this contradicts the assumption.
Comments9 pages, 3 figures
