IFPM Theory and Coupled-Channels Calculations of K/Sup n/L/Sup V/ Multiple Vacancy Distributions in Ion-Atom Collisions

摘要

Multiple L-shell vacancy production in the target can be very copious when the impact parameter, B, is near or within the L-shell radius. Small B values can be selected either by detecting K-shell vacancies (x-ray or Auger satellites (K exp 1 ) or hypersatellites (K exp 2 )) or by detecting the projectile at a relatively large scattering angle. There are plentiful data for L-vacancy distributions of satellites, but very few for K exp 0 or K exp 2 . Until our recent work, the satellite data had been interpreted mainly in terms of a binomial distribution (or product of them) at each B, a model in which the emissions of electrons are statistically independent. For the related problem of electron transfer in coincidence with a K vacancy we have found that, even in the independent Fermi particle model (IFPM), correlation effects from interference of amplitudes grow with the projectile charge, Z/sub p/, and become quite significant for Z/sub p/ greater than or equal to 3. Consequently, we formulated the IFPM theory of multiple vacancy production to investigate the degree of breakdown of statistical independence. (ERA citation 07:063617)