Scattering between Hg atoms and light atomic projectiles of keV energies

Previously described measurements for the scattering of ¹H⁺, ⁴He⁺, ¹¹B⁺, and ¹⁴N⁺ ions of energies $9<E<75$ keV by a thermal beam of Hg atoms have been extended to smaller angles. Angular distributions for 2.8<θ_L<40 deg have been measured for the scattering of all projectiles independent of final charge state. Differential scattering cross sections are in approximate agreement with the theory for scattering in a Thomas-Fermi potential over a range of five orders of magnitude. When the cross sections are reduced by the Lindhard procedure, we find that the Thomas-Fermi interaction is a better approximation to the actual potential than the Lenz-Jensen interaction.