| Popis: |
Coupling effects among the channels for collisional excitation of 2/ital s//sup 2/2p/sup 4/, 2/ital s/2/ital p//sup 5/, and 2/ital p//sup 6/ configurations of oxygenlike krypton have been reinvestigated and found to be small. In an earlier publication, it was reported that coupling to the 2/ital s/2/ital p//sup 5/ /sup 3/P/degree/ state has a strong influence on the cross section /sigma/(2/ital s//sup 2/2/ital p//sup 4//ital P//r arrow/2/ital p//sup 6/ /sup 1//ital S/). 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, /Sigma/, 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. |
