Oscillator strengths and collision strengths for S IV
Abstract
Collision strengths for S IV for excitation between the fine structure levels of the 3s(2) 3p for ground state and excited states 3s3p(24)P, 2D, 2P, and 2S are calculated in two-state and five-state close-coupling approximations for the energy range 1.3-6.0 R. Configuration-interaction target wave functions which gave oscillator strengths accurate to 10% are used in the expansion. Comparison with beam-foil experimental data is good. It is concluded that use of elaborate wave functions is more important than the choice of the scattering approximation.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1980
- DOI:
- 10.1086/158241
- Bibcode:
- 1980ApJ...240..368B
- Keywords:
-
- Atomic Energy Levels;
- Atomic Excitations;
- Sulfur Isotopes;
- Transition Probabilities;
- Fine Structure;
- Ground State;
- Molecular Orbitals;
- Wave Functions;
- Astrophysics