Preliminary results of simulating interaction of 0.01–3.0 MeV positrons with tungsten targets

Reflection and transmission of positrons falling on tungsten targets were simulated by the Monte-Carlo method. The calculations were made for a simplified approximation of a narrow beam of monoenergetic positrons on a grid of 15 points in the 0.01–3.0 MeV energy range and for positrons with the 62Cu β-decay energy spectrum, for various incidence angles. Histograms by coordinates of moderated positron stop points in the target and by angle–energy distribution of positrons leaving the target, for cases of a semi-infinite target and a single foil 0.02 mm thick, are depicted.