Silver-activated radiophotoluminescent glass: band assignments and a novel readout system using a modulated UV laser diode

We investigated the assignments and characteristics of the X-ray-induced colour centres in a silver-activated radiophotoluminescent glass. The induced-absorption spectrum was decomposed into six Gaussian bands, which were, in turn, attributed to the Ag+, Ag3+ or Ag32+, Ag2+, Ag2+, Ag0 and hole-trap centres, respectively, by means of optical and thermal measurements. All components of the blue and orange radiophotoluminescence (RPL) in a silver-activated phosphate glass were confirmed to be X-ray-induced colour centres. We also proposed and constructed a new readout system for the measurement of the RPL of the glass dosimeter that considers the characteristics of the radiation-induced bands.