K-K transfer cross sections in near-symmetric Fe26+ion-atom collisions at intermediate velocity

Abstract
The authors have measured K-K transfer cross sections for 400 MeV bare Fe26+ ions colliding with Ar, Kr, Zr, Ag and Sn targets in the intermediate velocity range (v/vKP approximately 0.6 and 0.4KTKP, vKT are the K orbital velocities of the projectile and target respectively). Cross sections have been extracted from the analysis of single K and double K target vacancy production as a function of the projectile charge state. Experimental results have been compared with theoretical calculations based on a two-state expansion method: good agreement is found and in particular the data are consistent with the theoretical behaviour predicted round the symmetry region ZP=ZT.