Effective charge parametrization for 7Li, 11B, 12C, 14N, 16O, 27Al, 28Si, 31P, 32S, and 35Cl projectiles traversing Mylar targets

Abstract

Some recent measurements of the stopping powers of Mylar foils for 0.2–2.1 MeV/u 7Li, 11B, 12C, 14N, 16O, 27Al, 28Si, 31P, 32S, and 35Cl projectiles have been subjected to analysis in terms of the modified Bethe–Bloch theory in order to obtain values of projectile effective charge parameters. Although both one- and two-parameter fits were attempted, only the former yielded meaningful results. The one-parameter fits manifested considerable internal consistency, and reasonable consistency with results obtained in recent similar analyses of Kapton, Havar, and nickel stopping powers for 7Li, 11B, 12C, 14N, and 16O projectiles.