Bethe-bloch stopping power parameters for light projectiles at energies near the stopping power maximum

Recent measurements of the stopping power of H ₂, He, O ₂, N ₂, Ne, Ar, Kr and Xe for protons and alpha particles near the stopping power maximum have been analyzed with modified Bethe—Bloch theory in conjunction with an effective charge factor. Satisfactory fits were attained with a single charge state parameter, in general, although the shell corrections used required an increase in prescribed values of about 22% for low velocity protons traversing Ar, Kr, and Xe targets.