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 × 10^?4 W/cm² 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.