Polycarbonate, Mylar and Havar stopping powers for 1.0-3.25 MeV/nucleon 40Ar-ions

Stopping powers of polycarbonate, Mylar and Havar for 1.0-3.25 MeV/nucleon Ar-40-ions have been determined by the transmission method in two geometries. The stopping power values were obtained within uncertainty of 2.1-4.5% for the various materials. The present results are compared with the predictions obtained by the most commonly used procedures employed in obtaining stopping powers. These include the Northcliffe and Schilling model, semiempirical parametrization of Ziegler et al (SRIM2000) with and without the cores and bonds model and the Hubert etal formulation. SRIM2000 values were in good agreement in case of Mylar and Havar, on average within 3% of present results. For polycarbonate the differences were less than 6% on average. The cores and bonds (CAB) model improved the parametrization values slightly. The Northcliffe and Schilling model and the Hubert et al formulation both yielded values within 5% or less for Mylar and polycarbonate. For the Havar the Hubert et al formulation and the present results disagreed by 10% on average.