Multiple ionization of iodine for 2.5–5.0 MeV I(22+) ions impacting on Fe target

The L-shell X-ray emissions of iodine are investigated as a function of the incident energy for I(22+) ions impacting on Fe target in the energy region near the Bohr velocity. Six distinct L-subshell X-rays, Lι, Lα(1, 2), Lβ(1, 3, 4), Lβ(2, 15), Lγ(1) and Lγ(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 Lι, Lβ(1, 3, 4), Lβ(2, 15), to Lα(1, 2), Lι to Lβ(2, 15) and Lγ(2, 3, 4, 4/) to Lγ(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.