Bethe-Bloch stopping power parameters for polystyrene, kapton, and mylar

Values of several parameters appearing in the modified Bethe–Bloch theory must be known if one is to calculate the stopping power for a given projectile–target combination within the energy interval of applicability of the theory. In the course of the past several years, the author has established values for kapton and mylar target materials through fits of experimental data with the modified Bethe–Bloch theory. During the past year, several sets of measurements of polystyrene stopping powers for light projectiles have been studied so as to extract values of Bethe–Bloch parameters also for this target material. Results of these studies, including uncertainties in the parameter values that reflect the number and accuracy of the measurements analyzed, are summarized in this presentation.