5 papers
Precise ab initio calculations of He() fine structure of high Rydberg states
Hao Fang, Jing Chi, Xiao-Qiu Qi +3
High-precision measurements of the fine-structure splittings in helium high Rydberg states have been reported, yet corresponding ab initio benchmarks for direct comparison remain u…
Theory for the Rydberg states of helium: Comparison with experiment for the state ()
Aaron T. Bondy, G. W. F. Drake, Cody McLeod +3
Recent measurements of the ionization energies of the Rydberg states of helium for principal quantum number and higher present a new challenge to theoretical atomic…
Revised He nuclear charge radius due to electronic hyperfine mixing
Xiao-Qiu Qi, Pei-Pei Zhang, Zong-Chao Yan +4
The significant discrepancy in the difference of squared nuclear charge radii of He obtained from electronic-atom or muonic-atom energy levels is a puzzle. In this p…
Precision calculation of hyperfine structure of Be ions
Xiao-Qiu Qi, Pei-Pei Zhang, Zong-Chao Yan +4
The hyperfine structures of the and states of the Be and Be ions are investigated within the framework of the nonrelativistic quantu…
Precision calculation of hyperfine structure and the Zemach radii of Li ions
Xiao-Qiu Qi, Pei-Pei Zhang, Zong-Chao Yan +7
The hyperfine structures of the states of the Li and Li ions are investigated theoretically to extract the Zemach radii of the Li and Li nuclei…