X-ray emission studies from highly ionized swift projectiles passing through thin carbon foil

Abstract

X-rays have been detected from highly ionized swift projectiles of 75As and 80Se passing through thin carbon foils. The investigations have been made at two projectile energies of 55 and 80 MeV for 75As ions and 66 and 90 MeV for 80Se ions. The Kβ/Kα ratios of the ions have been found to be almost half of the free atom values which can be attributed to the sum of the effects caused by vacancies in L and M Shells. In addition to two normal L x-ray peaks a third peak corresponding to LREC (L-shell radiative electron capture) has been observed. All the x-ray lines show a shift towards higher energy due to perturbation of the energy levels. The relative REC cross-section between lower and higher projectile energies shows excellent agreement with the theoretical results obtained under the dipole approximation.