THE INFLUENCE OF GLASS COMPOSITION ON THE PROPERTIES OF SILVER-DOPED RADIOPHOTOLUMINESCENT PHOSPHATE-GLASSES

The influence of glass composition on the sensitivity to ionizing radi ation as well as on the radiophotoluminescence 'build-up' kinetics is studied in silver doped glass system XNaPO(3), (100 - X)Ca(PO3)(2), wh ere X varied from 0 to 100 mol%. Concentration of Ag2O was 0.1 wt%. Al l glass compositions were prepared in a globar-heated furnace 1000-120 0 degrees C. Gamma-irradiated glasses, containing radiation-induced pa ramagnetic centers of photoluminescence, were investigated by electron spin resonance and luminescence spectroscopic methods. The variation of NaPO3 concentration from 100 to 40 mol% have decreased the glass se nsitivity to gamma-radiation more than 800 times and simultaneously ha ve increased the 'build-up' time of radiophotoluminescent centers. Roo m temperature stable Ag-0 atoms were detected in the glass, containing 30 mol% NaPO3 and less. Results are discussed based on the model of p ost-radiational relaxation. It is shown that all effects found in this work are caused by the decrease of Ag+ ion mobilities with decrease o f alkali content in the glass.