Range calculations for high-energy heavy atoms in complex media

Abstract

Abstract The computer code MARLOWE was used to evaluate energy vs. range curves in the binary collision approximation. The program was extended to the high-energy regime taking into account the stripping of electrons from the projectile and the concomitant changes in the interaction potentials especially for the inelastic part of the collisions. A complementary computer code LATTIC was developed for the parameterization of the lattice description. This code enables the application of MARLOWE to target materials with complicated crystallographic structure, such as, e.g. ThF4, KClO4 and NH4Cl. Test calculations for a series of projectile/target combinations showed a reasonable agreement with experimental recoil ranges of Pd, Ag, Os, and Ir isotopes from proton induced spallation in different targets. These calculations also indicate that density effects, i.e. the reduction in the ionization loss of fast charged particles due to the dielectric polarization of the medium, seem to be of minor importance for pa...