No abstract

Spatially separated stable charge centers -trapped electrons and self-trapped holes -are generated in Ar cryocrystals by a low-energy electron beam. A combination of the cathodoluminescence and photon-stimulated luminescence methods has been used to probe recombination reactions. Photon-stimulated vacuum ultraviolet intrinsic recombination luminescence from pre-irradiated solid Ar was detected for the first time. The 1.96 eV laser light has been demonstrated to release electrons from their traps that gives rise to the well-known M-band at 9.8 eV. Additional information on the photostability of charge centers at low temperatures has been obtained.

The integrated yield of desorption of solid methane particles under irradiation by an electron beam at a helium temperature was studied. The effect of explosive desorption from the solid methane surface was determined when a critical irradiation dose of ∼ 100 eV per methane molecule was reached. The yield of particles is accompanied by a cathodoluminescence burst of solid methane. This effect is preceded by an increase in the intensity oscillations of the desorption yield, with a period of 10 s.