Abstract
Absolute ionization cross sections for the subshells of Au by proton bombardment (0.25-5.2 MeV) have been determined from data obtained using a Si(Li) detector and the presently available values for radiative transition probabilities, fluorescence yields, and Coster-Kronig factors. The measured cross sections are compared with values calculated by Choi using the plane-wave Born approximation (PWBA) with either relativistic or nonrelativistic hydrogenic wave functions for the Au electrons. Except at low energies () where the uncorrected PWBA is questionable, the agreement is good. A plateau in the ionization cross section attributable to the bimodal -electron wave function is observed in the region 0.5-1.0 MeV. Ionization by He ions (1-12 MeV) is similar, but significant differences in subshell behavior are observed.
- Received 23 July 1973
DOI:https://doi.org/10.1103/PhysRevA.9.192
©1974 American Physical Society