CALCULATION OF THE ENERGY LOSSES OF FAST ELECTRONS PASSING THROUGH EPOXY COMPOSITE

Abstract

Calculations of the transmission factor, radiation, ionization and total losses for electrons with the energies of 10 MeV and 12 MeV that passing a layer of epoxy resin with a thickness of 5 mm with PEPA hardener (12 parts by weight) and with fillers of the iron and aluminum powders (30 parts by weigh) were conducted. It was established that the ionization losses of energy of fast electrons far exceed the radiation losses and increasing when imposing aluminum and iron powder fillers into the polymer matrix. In so doing, the transmission factor of the electron beam becomes smaller. Such electron energy losses for the epoxy composite layer with iron powder filler are greatest.

This explains the high radiation resistance of the previously investigated n-Ge single crystals with such a protective epoxy coating layer to electron irradiation with energy of 10 MeV. A layer of epoxy resin ED-20 with aluminum and iron powder fillers may be promising material for creating relatively cheap, lightweight and technological protective coatings of elements of semiconductor electronics against the aggressive action of high-energy electron irradiation. The presented theoretical calculations can be used in the development and in modeling of such epoxy composite protective coatings of sensitive elements or semiconductor enclosures, which are in conditions of a high radiation.