Influence of gamma-irradiation on the photoluminescent properties of porous glasses

Influence of small doses of gamma -irradiation on the features of the photo luminescence spectra of porous silica glass during long-time (several month s) storage after the irradiation is investigated. The non-monotonic depende nce of photoluminescence change on the dose of the glasses with a different composition and different additional pre-treatment is observed. The analys is of intensity changes and shifts of the maxims of photoluminescence spect ra shows long-time oscillations. This indicates that composite catalytic pr ocesses take place on the surface of pores. Perhaps the small gamma -radiat ion doses initiate the cyclic process of the surface state transformation o n the inner side of pores.