论文标题
原子核中浆果阶段的表现$^{213} $ pb
Manifestation of the Berry phase in the atomic nucleus $^{213}$Pb
论文作者
论文摘要
富含中子的$^{213} $ pb同位素是在主1 GEV $ a $ a $^{238} $ u beam的碎片中产生的，在质量和原子数中分为frs和原子数，然后植入Isomer衰减$γ$ -DARE SPECTROSCOPY，并在GSI处使用升高的设置。新观察到的异构体及其测量的衰减特性表明，$^{213} $ pb中的状态的特征是资历量子数，该量子数计数不成对与角动量$ j = 0 $相连的核子。资历的保存是与粒子孔结合相关的浆果相的结果，该浆果相对于颗粒 - 孔结合而变化，因此在半魔法核中可观察到，其中核子半填充价壳。因此，发现$γ$ -Ray光谱可观察的可观察力在$^{213} $ pb中被发现是由两种机制，粒子 - 孔偶联和资历保护驱动的，这些机制通过浆果阶段交织在一起。
The neutron-rich $^{213}$Pb isotope was produced in the fragmentation of a primary 1 GeV $A$ $^{238}$U beam, separated in FRS in mass and atomic number, and then implanted for isomer decay $γ$-ray spectroscopy with the RISING setup at GSI. A newly observed isomer and its measured decay properties indicate that states in $^{213}$Pb are characterized by the seniority quantum number that counts the nucleons not in pairs coupled to angular momentum $J=0$. The conservation of seniority is a consequence of the Berry phase associated with particle-hole conjugation, which becomes gauge invariant and therefore observable in semi-magic nuclei where nucleons half-fill the valence shell. The $γ$-ray spectroscopic observables in $^{213}$Pb are thus found to be driven by two mechanisms, particle-hole conjugation and seniority conservation, which are intertwined through the Berry phase.
