Date of Award


Degree Name

Master of Arts



First Advisor

Dr. John A. Tanis

Second Advisor

Dr. E. M. Bernstein

Third Advisor

Dr. L. D. Oppliger

Access Setting

Masters Thesis-Open Access


Projectile K x-ray yields have been measured as a function of target thickness (2.0-150 μg/ cm2) for 20-54 MeV Sq+ ions incident on this carbon foils using the WMU EN tandem Van de Graaff accelerator. The measured K x-ray yields were fond to increase for thicknesses < 15 μg/cm2 and decease for thicknesses > 15 μg/cm2 . The increasing yield is attributed to L-Shell non-equilibrium as the ion traverses the foil, while the decreasing yield is attributed to K-shell non-equilibrium. Analysis of the data was performed by modifying the "two-component" model of Betz et al. to include the effect of L-shell non-equilibrium. This model allows parametrization of the measured yields in terms of five parameters which are combinations of fundamental collision probabilities governing the projectile-target interaction. Least-squares fits to the data for each beam investigated yield the projectile energy dependence of the five parameters.