Including a distribution of threshold displacement damage energy on the calculation of the damage function and electron's Non Ionizing energy Loss

The Norgett-Robinson-Torrens displacements per atom function is commonly used to estimate the amount of atomic displacement produced by incident energetic particles. At low incident energy, this function is defined as a step function presenting a single threshold displacement damage energy. But materials have different threshold as a function of the crystallographic orientation. Molecular dynamic simulations show that a continuously varying damage energy probability is best suited to represent the threshold damage region. This work proposes a method to introduce in the NRT damage function a continuous damage energy distribution. The impact of a change on the damage function in the threshold region is evaluated on the incident electrons` Non Ionizing energy Loss.