<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>K</mml:mi></mml:math>-shell ionization of Ti, Fe, Ni, and Zn by 60-150-keV protons

Abstract

$K$-shell ionization of thick targets of Ti, Fe, Ni, and Zn by 60-150-keV protons has been investigated. Experimental x-ray production cross sections have been determined as a function of proton energy. Absolute ionization cross sections are compared to predictions of the perturbed-stationary-state theory, including Coulomb deflection and approximate relativistic corrections (CPSSR). It is found that the CPSSR systematically overpredicts the values for the experimental data at the lower proton energies.