Multiple ionization of iodine for 2.5-5.0 MeV I22+ ions impacting on Fe target

The L-shell X-ray emissions of iodine are investigated as a function of the incident energy for I22+ ions impacting on Fe target in the energy region near the Bohr velocity. Six distinct L-subshell X-rays, L iota, L alpha(1, 2), L beta(1, 3, 4), L beta(2, 15), L gamma(1) and L gamma(')(2, 3, 4, 4), are observed. Compared to the atomic data, the energy of the experimental X ray shifts to the higher energy side. The relative intensity ratios of L iota, L beta(1, 3, 4), L beta(2, 15), to L alpha(1, 2), L iota to L beta(2, 15) and L gamma(2, 3, 4, 4/) to L gamma(1) are enhanced, but has no obvious change with the increase of projectile energy in the present energy region. That is interpreted by the multiple ionization effect of the M-, N- and O-shell electrons.