Proton-inducedK-shell ionization cross sections for selected elements Ag to La: 0.6-2.0 MeV

Abstract

$K$-shell x-ray and ionization cross sections are reported for protons on Ag, Cd, Sn, Sb, Te, Ba, and La over the ion energy range of 0.6-2.0 MeV. The data are compared with the predictions of the nonrelativistic plane-wave Born approximation (PWBA), the nonrelativistic PWBA with corrections for binding energy and/or Coulomb deflection, binary-exchange approximation (BEA), and the constrained BEA predictions. In general the nonrelativistic PWBA with binding-energy corrections gives the best over-all agreement with the measurements of proton-induced x-ray processes for the $K$ shells of the elements studied in this work. The data further suggest the need for relativistic PWBA treatment of the interactions in the $K$ shell for the range of binding energies represented by the elements investigated in this work.