Integral energy and charge calculation near the interface of dissimilar media under gamma irradiation

The semiempirical model of secondary electron transport is described to estimate the charge and the dose deposition near an interface of dissimilar materials irradiated by γ-quanta. In the present work we extend applicability of early developed model to some MeV energy and the arbitrary angle of incidence of the photon. The input of suggested model is the secondary electron yield and effective reflection coefficient. The tables of these parameters were obtained by means of the special Monte Carlo code for Z=6-79 (C, Al, Cu, Ag, Au) and different initial angles of photons with energy 0.1-2 MeV. It is found that energy and particle reflection coefficients differ by the factor of approximately 1.5. The deposited charge calculated according to the model suggested agree with that obtained by direct simulation technique with accuracy less then 10% for every combination of materials in the energy range considered