Relativistic many-body perturbation calculations on extreme ultraviolet and soft-x-ray transition energies in siliconlike iron
Abstract
Relativistic multireference many-body perturbation theory is generalized to calculate the energies of highly excited levels in multivalence-electron ions of iron group elements responsible for soft-x-ray emission lines. Term energies of the highly excited n=4 states arising from the 3 s2 3p4l ( l=0 3 ) and 3s3 p2 4l ( l=0 3 ) configurations in Fe XIII are computed to high accuracy. Theoretical electric dipole transition probabilities and wavelengths of the transitions to low-lying n=3 levels are compared with solar and laboratory lines to identify hitherto unidentified and/or poorly characterized extreme ultraviolet and soft-x-ray spectral lines. E1 , E2 , and M1 decay rates and lifetimes of lower excited levels of the n=3 manifold are evaluated as a benchmark for future experiments.
- Publication:
-
Physical Review A
- Pub Date:
- June 2004
- DOI:
- 10.1103/PhysRevA.69.062503
- Bibcode:
- 2004PhRvA..69f2503V
- Keywords:
-
- 31.15.Ar;
- 31.15.Md;
- 31.15.Ne;
- 31.25.Jf;
- Ab initio calculations;
- Perturbation theory;
- Self-consistent-field methods;
- Electron correlation calculations for atoms and ions: excited states