Influence of initial state distortion in ion-atom collisions

M. F. Ciappina*, W. R. Cravero, C. R. Garibotti

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We have studied the influence of initial state distortion in a single ionization by ion impact. We have taken a continuum distorted wave type distortion and by taking up to the first order in its asymptotic series expansion we build an eikonal-spherical distortion. In this way the influence of each term in the transition amplitude can be stated. This approximation can be considered an intermediate one between the eikonal initial state and the continuum distorted wave approaches for initial state distortion. We have computed doubly differential cross sections for helium ionization by protons and highly charged ions at high and intermediate impact energy. We have also discussed the contribution of the different terms in electron energy spectra, specially in the vicinity of ECC peak. Very good agreement is found with the available experimental data.

Original languageEnglish
Pages (from-to)2057-2066
Number of pages10
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number10
StatePublished - 28 May 2004
Externally publishedYes


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