Roles of Pauli Correlations, Channel Couplings, and Shake-off in Ion-Induced KL/Sup V/ and K exp 2 L/Sup V/ Multiple-Vacancy Production

摘要

Cross sections for target K-plus-L-shell multiple-vacancy production by ions can be inferred from experimental measurements of K x-ray and Auger satellite intensities. The theory of K/sup n/L/sup v/ multiple-vacancy distributions has been generalized from the single-particle model (the statistically independent electron approximation) to the independent Fermi particle model. The Pauli correlations (electron exchange terms) are found to nearly cancel in many cases because of a tendency toward random phases. This results in the first quantal demonstration that the vacancy distribution is nearly binomial (but slightly narrower). Calculations have been generalized from the traditional first-order approximations to unitary approximations (first Magnus and coupled-channels) which correctly predict the saturation of the mean vacancy probability with increasing projectile charge. The recent availability of satellite and hypersatellite data for the same collision system makes possible the beginning of an investigation of the effects of increased removal energies and increased shaking in hypersatellites (K exp 2 L/sup v/) as compared with satellites. We review our unified treatment of ion-plus-shaking induced amplitudes for L-vacancy production accompanying ion-generated K-holes. Calculations for C exp 6+ + Ne satellite and hypersatellite vacancy distributions are presented. (ERA citation 09:044920)