Special Features of the Preliminary γ‐Irradiation Influence on Photoluminescence of Multi‐Component Silicate Glasses

Abstract

In multi‐component silicate glasses, under the UV‐excitation, time‐resolved luminescence spectra were observed. These spectra occupied the region of 350–700 nm. The dynamics of changes in radiation induced absorption and spectral‐kinetic characteristics of luminescence of γ‐irradiation glasses at the expiry of prolonged time were studied. It is assumed that the luminescence in these glasses is caused by quasi‐molecular compelxe centers which include the elements of base substance and impurity atom. These centers can appear in the glass both in the process of its melting and under the action of ionizing radiation. It is shown that, the centers of different origin are characterized by different spectral‐kinetic properties of their photoluminescence.

UV-laser coloration and bleaching of unirradiated and λ-irradiated silica glasses

“…We have previously reported [4] that after y-irradiation the intensity of the luminescence was increased 3 0 times and its spectrum was shifted to the short-wave region. Taking this fact into account, it is suggested that in the beginning in yirradiated F1087 glass samples radiation of nitrogen laser destroys the 'y-induced luminescence centers.…”

“…In the all time-resolved luminescence spectra of the irradiated sample, the statistical weight of long wave band was larger than the one in the spectra of the unirradiated sample. But this difference was not feasible at high delay times ofthe measuring strobe (150 is) [4].…”