Speaker
Summary
We start by studying and validating the many different GEANT4 stopping power parameterizations for the slowing down of low energy heavy ions in a substance. We do this by simulating proton and alpha emission in different materials, and comparing the total, as well as the electronic and nuclear stopping powers independently with those reported on NIST databases, SRIM results and experimental data. We also compare the stopping power of symmetrical projectile/target combinations of Si, Ge, LAr and LXe with predictions from different theories and SRIM. We then implement a brand new physical process in GEANT4 simulating the nuclear recoils of the atoms in the substance after the scattering of the incident particle. A full cascade is implemented. At first with start with the continuous slowing down approximation where the recoil energy is taken from the nuclear stopping parameterization. Then we implement a full discrete process with cross sections. The different quenching factors of the nuclear recoil cascade are then taken for the materials mentioned above and compared with the predictions of Lindhard, SRIM and experimental data.
