Hyperfine Effects in Ionic Orbital Electron Capture

Can Hyperfine Excitation explain the Observed Oscillation-Puzzle of Nuclear Orbital Electron Capture of Hydrogen-like Ions?

Modulated in time orbital electron capture (EC) decays have been observed recently in stored H-like $^{140}$Pr$^{58+}$ and $^{142}$Pm$^{60+}$ ions. Although, the experimental results are extensively discussed in literature, a firm interpretation has still to be established. Periodic transitions between the hyperfine states could possible lead to the observed effect. Both selected nuclides decay to stable daughter nuclei via allowed Gamow-Teller transitions. Due to the conservation of total angular momentum, the allowed EC decay can only proceed from the hyperfine ground state of parent ions. I…

转动-自旋耦合引起的类氢离子超精细能级分裂

Hyperfine Level Splitting for Hydrogen-Like Ions due to Rotation-Spin Coupling

自旋旋转耦合的理论方面。该方法是基于一般协方差原理。结果表明，自旋为1/2的裸粒子与自旋为1的裸粒子的旋引力比为1。这就是为什么自旋和旋转会以普通角动量的形式耦合。这一结果是曲柄模型的严格证实。为了观察这一现象，建议在储存环中进行类氢离子实验。发现在Darmstadt储存环ESR中循环的$^{140}{\rm Pr}^{58+}$和$^{142}{\rm Pm}^{60+}$离子的$1 ^2!S_{1/2}, F=1/2$超精细态沿螺旋轨道的分裂约为4.5 MHz。我们认为，这种分裂可以通过实验确定的离子干涉。

超精细分裂的核矢量极化率修正

Nuclear vector polarizability correction to hyperfine splitting

轨道电子与原子核的电荷和磁矩的相互作用使原子核极化，详细的描述需要仔细处理原子核的矢量极化率。我们提出了一个完整的和封闭的形式表达的超精细分裂轻原子系统的贡献。

通过超精细异常探测核磁化物的组成和分布：实验与核及原子理论的交汇：短寿命$^{47}$K

Interrogating the composition and distribution of nuclear magnetization via the hyperfine anomaly: experiment meets nuclear and atomic theory for short-lived $^{47}$K

本研究通过高精度测量短寿命$^{47}$K的拉莫尔频率，结合原子理论和核密度泛函理论，揭示核磁矩的自旋和轨道贡献，并修正核理论对自旋贡献的高估。