论文标题
n = 40反转岛的山顶：精确的质量测量和从头算计算中子富含铬的同位素
Summit of the N=40 Island of Inversion: precision mass measurements and ab initio calculations of neutron-rich chromium isotopes
论文作者
论文摘要
质量测量继续提供宝贵的信息，以阐明核结构和天体物理兴趣的情况。 $ z = 20 $和$ 28 $质子壳封闭之间的过渡区域尤其有趣，因为随着核的发作和核变形的发展和进化，随着核的较高中子的富含。这为新兴的AB-Initio核结构模型提供了关键的测试场。在这里，我们使用灵敏的静电多反射时间质谱仪（MR-TOF-MS（MR-TOF-MS）在Triumf的离子陷阱中用于原子和核科学（Titan）设施。我们的高精度质量测量值为$^{59，61-63} $ cr确认了先前的结果，并提高了$^{64-65} $ cr的测量精度，超过n = 40。通过从头开始中等相似性重归其化组，我们检查了同位素铬同位素的集体趋势，并给出了从钙到镍的n = 40反转岛的完整图片。
Mass measurements continue to provide invaluable information for elucidating nuclear structure and scenarios of astrophysical interest. The transition region between the $Z = 20$ and $28$ proton shell closures is particularly interesting due to the onset and evolution of nuclear deformation as nuclei become more neutron rich. This provides a critical testing ground for emerging ab-initio nuclear structure models. Here, we present high-precision mass measurements of neutron-rich chromium isotopes using the sensitive electrostatic Multiple-Reflection Time-Of-Flight Mass Spectrometer (MR-TOF-MS) at TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN) facility. Our high-precision mass measurements of $^{59, 61-63}$Cr confirm previous results, and the improved precision in measurements of $^{64-65}$Cr refine the mass surface beyond N=40. With the ab initio in-medium similarity renormalization group, we examine the trends in collectivity in chromium isotopes and give a complete picture of the N=40 island of inversion from calcium to nickel.
