Microscopic modelling of defects production and their annealing after irradiation in silicon for HEP particle detectors

In this contribution, the production of defects in radiation fields and their evolution toward equilibrium in silicon for detector uses has been modelled. In the quantitative model developed, the generation rate of primary defects is calculated starting from the projectile–silicon interaction and from recoil energy redistribution in the lattice. Vacancy–interstitial annihilation, interstitial migration to sinks, divacancy and vacancy–impurity complex (VP, VO, V2O, CiOi and CiCs) formation are considered. sults of the model support the experimental available data. The correlation between the initial material parameters, temperature, irradiation and annealing history is established. The model predictions could be a useful clue in obtaining harder materials for detectors at the new generation of accelerators or for space missions.