INFLUENCE OF THE INITIAL-STATE AND FINAL-STATE CONFIGURATION-INTERACTION ON THE ANISOTROPY OF THE RESONANT AUGER DECAY OF KR 3D(-1)5P AND XE 4D(-1)6P STATES

The anisotropy of the resonant Auger decay of photon-excited Kr 3d3/2, 5/2(-1) 5p and Xe 4d3/2,5/2(-1) 6p states has been studied by the mult iconfiguration Dirac-Fock method. The calculations account for the con figuration interaction both in the initial and in the final states of the Auger decay. For the nonresolved nd-1(n + 2)p (J = 1) resonances ( n = 3 for Kr, and n = 4 for Xe) the average intensities and the anisot ropies of the Auger lines were calculated by weighing each partial rat e by the pertinent Dirac-Fock photoexcitation probabilities. Our resul ts show that, in addition to the initial- and final-state correlation, both the relaxation and the exchange interaction have a substantial e ffect on the anisotropy of these Auger spectra. For most Auger lines t here is good agreement between our calculated beta parameters and expe rimental values for the Kr and Xe nd5/2(-1)(n + 2)p photoexcitation re sonances; there is also satisfactory agreement for the Kr 3d3/2(-1)5p and Xe 4d3/2(-1)6p resonant Auger spectra. However, the remaining nota ble discrepancies between theory and experiment indicate that importan t correlation effects are still omitted in our calculations. Discrepan cies between different experimental results stress the need for furthe r improvements on the experimental side.