Higher order interelectronic-interaction correctionsto the ground-state hyperfine splitting in lithiumlike ions

2000 ◽  
Vol 78 (7) ◽  
pp. 701-709 ◽  
Author(s):  
O M Zherebtsov ◽  
V M Shabaev
Keyword(s):  
Ground State ◽  
Hyperfine Splitting ◽  
Nuclear Model ◽  
Magnetization Distribution ◽  
Configuration Interaction Method ◽  
Nuclear Magnetization ◽  
Theoretical Predictions ◽  
Relativistic Configuration ◽  
Relativistic Configuration Interaction ◽  
Interelectronic Interaction

The interelectronic-interaction corrections of the second order in 1/Z to the ground-state hyperfine splitting in lithiumlike ions are evaluated. The calculations are performed by using the relativistic configuration-interaction method and perturbation theory. In addition, the nuclear magnetization distribution effect on the interelectronic-interaction correction of the first order in 1/Z is evaluated within the single-particle nuclear model. The calculations provide an improvement in the theoretical predictions for the hyperfine splitting in lithiumlike ions. PACS Nos.: 31.30Gs, 31.30Jv

Hyperfine quenching of the metastable 4s4p 3P0 and 3P2 states of Zn-like ions1This article is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas.

2011 ◽  
Vol 89 (4) ◽  
pp. 473-482 ◽  
Author(s):  
M.H. Chen ◽  
K.T. Cheng
Keyword(s):  
Large Scale ◽  
Decay Rates ◽  
Oscillator Strengths ◽  
Energy Separation ◽  
Configuration Interaction Method ◽  
International Colloquium ◽  
Theoretical Predictions ◽  
Relativistic Configuration ◽  
Relativistic Configuration Interaction ◽  
Hyperfine Quenching

The hyperfine-induced 4s4p 3P0,2–4s2 1S0 transition rates for Zn-like ions with Z = 30–66 are calculated using a large scale relativistic configuration-interaction method. Comparisons are made between different approaches to hyperfine quenching studies, and discussions are given to the significance of various contributions. For the 3P0 state, the effect of the 1P1 state on hyperfine quenching is found to be quite substantial and cannot be ignored in spite of the large energy separation. For the 3P2 state, hyperfine quenching leads to different decay rates to the ground state for different hyperfine levels and the induced decays can dominated over the unperturbed M2 transition. The present results are compared with the other theoretical predictions, and reasons for the discrepancies are discussed.

Allowed and forbidden transition rates and corresponding wavelengths for Si-like Au ion (Au65+) by relativistic configuration interaction method

2018 ◽  
Vol 96 (10) ◽  
pp. 1116-1137
Author(s):  
S.M. Hamasha ◽  
A. Almashaqba
Keyword(s):  
Configuration Interaction ◽  
Energy Levels ◽  
Theoretical Data ◽  
Oscillator Strengths ◽  
Atomic Data ◽  
Transition Rates ◽  
Interaction Method ◽  
Configuration Interaction Method ◽  
Relativistic Configuration ◽  
Relativistic Configuration Interaction

Large-scale atomic calculations are carried out to produce data of atomic structure and transitions rates for Si-like Au ion (Au65+). Generated atomic data are essential for modeling of M-shell spectra of gold ions in Au plasma, and fusion research. Energy levels are calculated by applying two methods: the relativistic configuration interaction method (RCI) of the flexible atomic code (FAC) and the multi-reference many body perturbation theory method (MR-MBPT). Energy levels, oscillator strengths, and transition rates are calculated for transitions between excited and ground states from n = 3l to n′l′, where n′ = 4, 5, 6, and 7; and l and l′ are the proper angular momenta of shells n and n′, respectively. The electric dipole (E1), electric quadrupole (E2), electric octupole (E3), magnetic dipole (M1), magnetic quadrupole (M2), and magnetic octupole (M3) transitions are all considered in the calculations. Correlation effects, relativistic effects, and QED effects are also included in the calculations. The two methods yield comparable values of energy levels. Data of energy levels of low-lying states and data for inner shell transitions reported in this study demonstrate good agreement with published experimental and theoretical data.

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