Paper Title
A Comprehensive SRIM and PALS Analysis of Heavy Ion-Irradiation of Polyethylene Composites with Martian Regolith

Abstract
The preliminary results of defect analysis using SRIM computer code in UHMW polyethylene and its composites with Martian Regolith (MR) subjected to irradiation by 600 MeV/u 56Fe+-ions were previously reported. A more detailed and comprehensive analysis of SRIM is presented here along with a comparative study of nano-porosity obtained from the Positron Annihilation Lifetime Spectroscopy (PALS). The differences observed in the nano-porous free volume from PALS and in the flexural stress are explained in terms of the variations in vacancy concentrations, dissipated energy density, ratio between H-vacancies to C-vacancies, and their influence on chemical transformations. Keywords - Ion-irradiation, Polyethylene Composites, Martian Regolith, SIRM Analysis.