Investigation of Coulomb deflection effects on L3-subshell alignment and L-subshell ionisation cross sections

Abstract

The alignment of the L3 subshell has been determined from the measured angular distribution of the Ll X-ray line of gold ionised by 0.3 MeV protons and 0.4-0.66 MeV deuterons. For deuteron impact the absolute value of the alignment parameter has been found to be larger than earlier results for proton and helium projectiles of the same velocities, indicating the presence of a projectile atomic number dependence of L3-subshell alignment at these low projectile velocities. The ratios of L-subshell ionisation cross sections for Sm, Er and Au by 0.2 MeV u-1 proton and deuteron impact and those for Au by 0.3 MeV u-1 proton and deuteron impact are also reported. The Coulomb deflection factor deduced from these data has been compared with different types of Coulomb deflection factors, and it is found to be in good agreement with the Coulomb deflection factor of Anholt et al (1979) and that of Brandt and Lapicki (1979).