Role of coulomb deflection in light ion induced L shell ionization

  • Harrigan M
  • Cohen D
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Abstract

Measured L subshell ionization cross sections for H+and He+bombardment of Sb (Z = 51), Gd (Z = 64), W (Z = 74) and Au (Z = 79) targets in the energy range 0.1-2.0 MeV u are compared with the ECPSSR theory. Significant discrepancies between experiment and theory are observed for the L2, subshell and for bombarding ion energies below about 0.5 MeV u. Since binding (PSS) and relativistic (R) effects have similar but opposite effects on the L subshell ionization cross sections the differences are examined in terms of the Coulomb deflection (C) of the bombarding particle. For the L2subshell at least, the Coulomb deflection factors incorporated in the ECPSSR theory overestimate the reduction in the ionization cross sections by a factor of ~ 2 for bombarding ion energies below about 0.5 MeV u. © 1986.

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