Charge-Change Cross Sections of Highly Charged 5 - 50 MeV Iodine Ions

Cross sections of I4+ to I18+ for electron capture and loss have been measured in N2 and Ar at low pressure. It has been found that the dependence on charge and velocity of capture cross sections is strongly influenced by the atomic structure of the ion. The applicability of simple classical modele for the capture process has been investigated.