TARGET DEPENDENCE OF MULTIELECTRON PROCESSES IN I-Q+ (Q=10, 15) PLUS RARE-GAS (NE, AR, KR AND XE) COLLISIONS

We have determined experimentally the absolute cross sections for i-electron capture (to projectile) and j-electron removal (from target) (sigma(q,q-i)(j)), total electron capture (sigma(q) = Sigma(i) sigma(q,q-i)), j-electron removal (sigma(q)(j) = Sigma(i) sigma(q,q-i)(j)) and i-electron capture (sigma(q,q-i) = Sigma(j) sigma(q,q-i)(j)) for the processes: I-q+ (q = 10 or 15) + B --> I-(q-i+) + B-j+ + (j - i)e (B = Ne, Ar, Kr and Xe) at collision energy of 1.5q keV. Charge-state distributions of the scattered ions were measured in coincidence with the recoil ions. The absolute electron-capture cross sections were measured by the initial growth-rate method. The experimental results for sigma(q) and sigma(q)(j) were compared with the predictions of the extended classical over-barrier model (ECBM). The branching ratios of the multiply-excited ions produced by multi-electron transfer have also been determined.