Properties of a surface contaminated by gaseous products of polymer composition materials under vacuum conditions

Optical properties and chemical composition of a surface that is contaminated by molecular flows consisting of gaseous products of polymer composition materials (e.g., EKOM-2 enamel) are experimentally studied. The polymer materials are irradiated using a short-wavelength source with a luminous intensity of 6 $\times$ 10$^{-4}$ W/cm$^2$ sr in the wavelength interval 90–320 nm in a vacuum chamber that is evacuated to a pressure of 10$^{-4}$–10$^{-3}$ Pa. An analytical solution is obtained for the problem of radiation fluxes in scattering and absorbing medium of precipitate on a mirror surface, and a relation of model absorption and scattering coefficients for optical radiation in such medium and transport coefficients of the Gurevich theory of turbid medium is demonstrated.