Relaxation effects in the photodetachment of intermediate p shells of chlorine and bromine negative ions

The photodetachment cross sections and angular distribution asymmetry parameters are calculated for intermediate p shells of chlorine and bromine negative ions in the relativistic random phase approximation (RRPA) to account for relativistic effects and many electron correlations, and, additionally, in the modified RRPA (RRPA-R) to account for the relaxation of the atomic core in the photodetachment process. The results of the calculations with and without the relaxation effects are compared, and it is found that the results for cross sections with and without relaxation effects in RRPA-R and RRPA are very different close to the corresponding thresholds. An attempt is made to explain the difference between the results of RRPA and RRPA-R close to the corresponding channel thresholds.PACS Nos.: 32.80.Gc, 32.80.Fb