Development of epoxy composite protective coatings for increasing the radiation stability of n-Ge single crystals

On the basis of Hall effect measurements, the temperature dependences of electrical conductivity and Hall constant were obtained for irradiated electrons with energy of 10 MeV and the flow of electrons Omega = 5.10(15) el/cm(2) of n-Ge single crystals coated with a layer of epoxy resin ED-20 with hardener PEPA (12 parts by weight), without and with fillers of iron or aluminum powders (30 parts by weight). From the analysis of the experimental results and theoretical calculations, it follows that the presence of such a coating layer increases the radiation resistance of germanium single crystals. It has been found that the best shielding ability from electron irradiation is provided by a layer of epoxy resin with a powder of iron. The obtained epoxy composite coatings can be used for germanium based semiconductor electronics as protective elements from the aggressive effects of radiation fields.