Study of ion-atom ionization using dressed ions and effective projectiles charge state

Synopsis In this report, we present a study of dressed ion projectile impact ionization of He and Ne atoms in the double differential cross section level. A large deviation from the q2-scaling of the DDCS was observed even for large impact parameter collisions. Different q-dependence (i.e. qn, n differs from 2) was found from which we calculated the effective projectile charge state. It also indicates the projectile screening mechanism which varies with impact parameter of the collision. For theoretical calculation we used GSZ model potential in the CDW-EIS framework, which gives an excellent agreement