Calculations of Cross-Sections for Excitation and Ionization of Inner Shells of Atoms by Heavy Ions in the Distortion Approximation

Takeshi Mukoyama ； 林啟東(C. D. Lin)

《Chinese Journal of Physics》 27卷2期 (1989/04) Pp. 117-125

並列摘要

Cross-sections for excitation and ionization of inner shells of atoms by massive ions are calculated in the distortion approximation. The target atom is approximated by a model potential and the electronic wave functions are expanded in terms of Slater-type oribtals to obtain bound states as well as pseudostates; the latter are used to represent the continuum states from which ionization cross sections are calculated. It is shown that the distortion approximation gives accurate results for the cross-sections for the total excitation and ionization over a large range of impact energies and is applicable to heavy projectiles. Comparisons with experiments for several systems and with other calculations are discussed.