Chin. Phys. Lett.  2019, Vol. 36 Issue (11): 113101    DOI: 10.1088/0256-307X/36/11/113101
Parameters of Isotope Shifts for $2s2p{}^{3,1}\!P_{1} \to 2s^{2}{}^{1}\!S_0$ Transitions in Heavy Be-Like Ions
Xiang Zhang1, Jian-Peng Liu1, Ji-Guang Li2**, Hong-Xin Zou1**
1College of Liberal Arts and Science, National University of Defense Technology, Changsha 410073
2Institute of Applied Physics and Computational Mathematics, Beijing 100088
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Xiang Zhang, Jian-Peng Liu, Ji-Guang Li et al  2019 Chin. Phys. Lett. 36 113101
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Abstract The field shift and mass shift parameters of the 2$s2p\,{}^{3,1}\!P_{1}\to 2s^{2}\,{}^{1}\!S_0$ transitions in Be-like ions ($70 \le Z \le 92$) are calculated using the multi-configuration Dirac–Hartree–Fock and the relativistic configuration interaction methods with the inclusion of the Breit interaction and the leading QED corrections. We find that the mass shift parameters of these two transitions do not change monotonously along the isoelectronic sequence in the high-$Z$ range due to the relativistic nuclear recoil effects. A minimum value exists for the specific mass shift parameters around $Z=80$, especially for the 2$s2p\,{}^{3}\!P_{1}\to 2s^{2}\,{}^{1}\!S_0$ transition. In addition, the field shifts and mass shifts of these two transitions are estimated using an empirical formula, and their contributions are compared along the isoelectronic sequence.
Received: 01 July 2019      Published: 21 October 2019
PACS:  31.15.V- (Electron correlation calculations for atoms, ions and molecules) (Relativistic configuration interaction (CI) and many-body perturbation calculations)  
  31.30.J- (Relativistic and quantum electrodynamic (QED) effects in atoms, molecules, and ions)  
  31.30.Gs (Hyperfine interactions and isotope effects)  
Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11874090, 11604385, 91536106 and 11204374, and the Research Project of National University of Defense Technology under Grant No ZK17-03-11.
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Xiang Zhang
Jian-Peng Liu
Ji-Guang Li
Hong-Xin Zou
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