Laser Spectroscopy of Neutron-Rich ^{207,208}Hg Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N=126 Shell Closure.
Laser Spectroscopy of Neutron-Rich ^{207,208}Hg Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N=126 Shell Closure.
复制标题
富中子 ^{207,208}Hg 同位素的激光光谱：照亮 N=126 壳闭合区域电荷半径的扭结和奇偶交错。
DOI：
10.1103/physrevlett.126.032502
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发表时间：
2021
影响因子：
8.6
通讯作者：
Day Goodacre T
中科院分区：
文献类型：
--
作者：
Day Goodacre T
首次研究了（，123，126）的均方电荷半径，并重新测量了（，123，126）的均方电荷半径。在中子壳层闭合处电荷半径的特征扭结已经被揭示，提供了关于质子壳层闭合以下电荷半径行为的第一个信息。在相对论Hartree-Bogoliubov和非相对论Hartree-Fock-Bogoliubov方法中进行了理论分析，同时考虑了新的汞结果和现有的铅数据。与以前的解释相反，它表明，无论是在扭结和奇偶交错（OES）在其附近可以主要描述在平均场水平，配对不需要发挥至关重要的作用，在其起源。提出了一种新的OES机制，它与奇核和偶核中不同中子轨道占据的交错有关，奇核的粒子振动耦合促进了这种交错。
The mean-square charge radii of(,, 128) have been studied for the first time and those of(, 123, 126) remeasured by the application of in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). The characteristic kink in the charge radii at theneutron shell closure has been revealed, providing the first information on its behavior below theproton shell closure. A theoretical analysis has been performed within relativistic Hartree-Bogoliubov and nonrelativistic Hartree-Fock-Bogoliubov approaches, considering both the new mercury results and existing lead data. Contrary to previous interpretations, it is demonstrated that both the kink atand the odd-even staggering (OES) in its vicinity can be described predominately at the mean-field level and that pairing does not need to play a crucial role in their origin. A new OES mechanism is suggested, related to the staggering in the occupation of the different neutron orbitals in odd- and even-nuclei, facilitated by particle-vibration coupling for odd-nuclei.