INCLUSIVE MULTICHANNEL MEASUREMENT OF THE IMPACT-PARAMETER DISTRIBUTION IN COLLISIONS OF SWIFT HEAVY-IONS WITH HE

Recoil ion momentum spectroscopy is used to stu;dy the impact-paramete r dependence of the single-ionization, double-ionization, single-captu re and transfer-ionization channels in fast collisions of highly charg ed ions with He. The possibility of obtaining a relationship between t he impact parameter and the transverse momentum of the recoil in inela stic collisions is investigated. It is found that a deflection functio n based on a static screening potential gives consistent agreement bet ween model calculations based on the independent electron approximatio n and the experimental data for all channels investigated and over the whole range of impact parameters deduced from the measurement.