Electronic stopping measurements of charged-particles in radiophotoluminescent glass

Measurements were made of the radiophotoluminescence generated in silver-activated phosphate glass by the electronic energy losses of 200–400 keV ions (H+, He+, O+) incident on the glass. Measurements of luminescence growth as a function of energy into electronic processes per unit volume show a departure from linearity above ∼1018 keV/cm3. For lower deposition values detailed measurements of the integral depth distribution of luminescence intensity were made as material was removed by vibratory polishing. The measured depth distributions compare favorably to the integral depth distributions of electronic energy losses predicted by LSS theory (He+ and O+) and to experimental values of thin film losses (H+). These comparisons indicate that the luminescent centers are formed in the glass close to (≤103 Å) the point of the initial deposition of electronic energy.