This paper presents results of experimental investigation of combined impact of 500 keV protons with fluences of 1015–1016 cm−2 and oxygen plasma with fluences of (0.8–3.5) 1020 cm−2 on polyimide films. Measured UV–vis transmission, Raman and XPS spectra of polyimide specimens before and after combined impact and data on the sample mass losses as a result of erosion due to oxygen plasma exposure are given. On the base of the obtained spectroscopic results, the changes in the polyimide structure caused by the proton and oxygen irradiation are analyzed and discussed.
Resonant coherent excitation of relativistic heavy ions in crystals under planar channeling conditions is considered at beam incidence inclined with respect to the channeling plane. The beam inclination leads to effective exclusion of contribution of ions with small energy of transverse motion from observables of resonant coherent excitation. This effect can be used for resolution of the observables by individual ion trajectories.