Investigating ground-state fine-structure properties to explore suitability of boronlike S11+−K14+ and galliumlike Nb10+−Ru13+ ions as possible atomic clocks
Investigating ground-state fine-structure properties to explore suitability of boronlike S11+−K14+ and galliumlike Nb10+−Ru13+ ions as possible atomic clocks
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DOI：
10.1103/physreva.99.022513
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发表时间：
2019-02
影响因子：
2.9
通讯作者：
Yan-mei Yu;B. Sahoo
中科院分区：
文献类型：
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作者：
Yan-mei Yu;B. Sahoo
我们研究了类硼离子的精细结构分裂和类镓离子的精细结构分裂的各种性质，以找出这些高电荷态离子用作合适的光学原子钟的可行性。由Dirac-Coulomb-Breit哈密顿量引起的电子关联和低阶量子电动力学效应在用相对论耦合团簇方法计算时钟跃迁涉及的态的电子亲和力、激发能、跃迁矩阵元、寿命、超精细结构常数和电四极矩中被清楚地显示出来。我们还估计了原子钟实验中最常见的由于电四极、二阶塞曼、直流和交流斯塔克以及上述精细结构分裂中的黑体辐射漂移而出现的系统效应，以展示典型的分数频移数量级。
We study various properties of thefine-structure splittings in the boronlike, andions and thefine-structure splittings in the galliumlike, andions to find out the feasibility of using these highly charged ions as suitable optical atomic clocks. The roles of the electron correlations due to the Dirac-Coulomb-Breit Hamiltonian and accounting for lower-order quantum electrodynamics effects are shown explicitly in the calculations of electron affinities, excitation energies, transition-matrix elements, lifetimes, hyperfine-structure constants, and electric quadrupole moments of the states involved with clock transitions using a relativistic couple-cluster method. We also estimate the most commonly appearing systematic effects in the atomic clock experiments due to the electric quadrupole, the second-order Zeeman, both the dc and ac Stark, and the black-body radiation shifts in the aforementioned fine-structure splittings to demonstrate typical orders of magnitude of fractional frequency shifts.