Stopping powers and energy loss of Mylar, Kapton, Havar, and Ni for 10<i>Z</i>=3–17 ions in the energy range 0.2–2.1 MeV/amu

Abstract

Stopping powers of Mylar, Kapton, Havar, and nickel for 0.27--1.94 MeV/amu $^{11}\mathrm{B}$ ions, 1.27--2.07 MeV/amu $^{12}\mathrm{C}$, 0.58--1.80 MeV/amu $^{14}\mathrm{N}$, and for 0.67--1.78 MeV/amu $^{16}\mathrm{O}$ ions have been determined. Energy loss and stopping powers of Mylar were measured for $^{27}\mathrm{Al}$, $^{28}\mathrm{Si}$, $^{31}\mathrm{P}$, $^{32}\mathrm{S}$, and $^{35}\mathrm{Cl}$ ions having energies between 7.6 and 24.6 MeV. Direct beam exposure of the foils was avoided by using a modified transmission geometry. Proton-energy loss, in the same geometry and at exactly the spot of the heavy-ion beam on the foils, was taken as a measure of foil thickness. The present data are brought together with our recent measurements of the stopping powers of the materials in this study for $^{7}\mathrm{Li}$, $^{11}\mathrm{B}$, $^{12}\mathrm{C}$, $^{14}\mathrm{N}$, and $^{16}\mathrm{O}$ ions. The experimental stopping powers are compared with predictions of two semiempirical scaling models, used in conjunction with Bragg's additivity rule, and with the stopping powers obtained by the trim-89 computer code. Comparisons have also been performed with the scanty experimental data in the literature. The systematics and the deviations of the stopping powers from the calculated predictions are discussed.