论文标题
中子丰富的$^{207,208} $ HG同位素的激光光谱：在$ n = 126 $封闭的情况下照亮扭结和奇怪的电荷radii
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
论文作者
论文摘要
首次研究了均值$^{207,208} $ hg（$ z = 80，$ z = 80，n = 127,128 $）的均值半径，而$^{202,203,206} $ hg（$ n = 122,123,126 $）的$^{202,203,206} $ hg（$^{202,203,206} $ hg）被iSsirife consonance-iiversectiance laseance and propectey coppersectiance comproppersectiation copertectiance rasece copersectiatians compyers（已经揭示了$ n = 126 $中子外壳闭合的电荷半径中的特征\ textit {kink}，从$ z = 82 $质子壳封闭的情况下，提供了有关其行为的第一个信息。考虑到新的汞结果和现有铅数据，在相对论的Hartree-Bogoliubov和非权威主义Hartree-fock-Bogoliubov方法中进行了理论分析。与以前的解释相反，可以证明，$ n = 126 $的扭结和附近的奇数惊人（OES）都可以在平均场水平上进行主要描述，并且配对无需在其起源中起关键作用。提出了一种新的OES机制，这与奇数和偶数$ a $ nuclei中不同中子轨道的占用而造成的惊人相关，这是由粒子振动偶联的奇数 - $ a $ a $ nuclei促进的。
The mean-square charge radii of $^{207,208}$Hg ($Z=80, N=127,128$) have been studied for the first time and those of $^{202,203,206}$Hg ($N=122,123,126$) remeasured by the application of in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). The characteristic \textit{kink} in the charge radii at the $N=126$ neutron shell closure has been revealed, providing the first information on its behavior below the $Z=82$ proton shell closure. A theoretical analysis has been performed within relativistic Hartree-Bogoliubov and non-relativistic 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 at $N=126$ and 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-$A$ nuclei, facilitated by particle-vibration coupling for odd-$A$ nuclei.
