Spectral properties and polarizabilities for fluorine-like ions with Z = 20-30
Abstract
Aims: The primary motivation of this paper is to provide accurate atomic properties of F-like ions with Z = 20-30, including energy levels, line strengths, static dipole polarizabilities, and lifetimes. In addition, a detailed analysis is also carried out to explore the convergence and uncertainties of our results.
Methods: Large-scale B-spline relativistic configuration interaction calculations are carried out to generate the atomic properties of F-like ions. The radial parts of one-electron Dirac orbitals are obtained from the relativistic self-consistent field procedure in which the Breit Interaction and QED corrections (vacuum polarization and self-energy terms) are also included. A numerical method, called Emu CI, is adopted to decrease the size of CI matrix significantly without loss of much accuracy.
Results: Energy levels and line strengths for electric-dipole (E1), electric-quadrupole (E2), and magnetic-dipole (M1) transitions are provided for the 250 lowest levels of each system, showing a good agreement with available theoretical and experimental information. The static dipole polarizabilities and lifetimes for the ten lowest states are also reported. A statement for the convergence and uncertainties of our results is presented.
- Publication:
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Astronomy and Astrophysics
- Pub Date:
- January 2021
- DOI:
- 10.1051/0004-6361/202039685
- Bibcode:
- 2021A&A...645A.136L
- Keywords:
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- atomic data;
- atomic processes;
- relativistic processes;
- methods: numerical