Contributions of Autoionizing Resonances to the Electron Collisional Excitation Rates for Be-Like Ions,
Abstract
The contributions of autoionizing resonances to the electron-impact excitation-rate coefficients for the n = 2 to n = 2 transitions in Be-like ions have been evaluated for six ions with atomic numbers Z = 30, 34, 36, 42, 47, and 54. The calculations were carried out in the isolated-resonance approximation. Interference between direct and resonance channels was neglected. The detailed Auger and radiative rates were computed using the multiconfiguration Dirac-Fock model. Results for 45 transitions among 10 states from '1s2 2l 2l' configurations are listed. For electric dipole allowed transitions, the contributions from the autoionizing resonance are quite small. However, the autoionizing resonances can enhance the excitation rates by a factor of 2-4 dipole forbidden transitions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 22, 1987
- Accession Number
- ADA190924
Entities
People
- Bernd Crasemann
- Mau H. Chen