Close-coupling cross sections for electron-impact excitation of Kr28+
Abstract
Coupling effects among the channels for collisional excitation of 2s22p4, 2s2p5, and 2p6 configurations of oxygenlike krypton have been reinvestigated and found to be small. In an earlier publication, it was reported that coupling to the 2s2p5 3° state has a strong influence on the cross section σ(2s22p4 3P-->2p6 1S). That apparent coupling is shown to be due to an inconsistency involving orthogonality and correlation functions. We solve the correct set of coupled integrodifferential equations using the niem, Σ, and rmatrix codes. All three calculations are performed using the same atomic states and the same configurations to describe the target. We find very good agreement among the cross sections obtained from all three codes. We also calculated distorted-wave cross sections for the same set of transitions. The distorted-wave results are nearly identical to the results obtained with the close-coupling codes.
- Publication:
-
Physical Review A
- Pub Date:
- August 1989
- DOI:
- 10.1103/PhysRevA.40.1823
- Bibcode:
- 1989PhRvA..40.1823R
- Keywords:
-
- 34.80.Kw;
- Electron-ion scattering;
- excitation and ionization