Measurements were made of the electron paramagnetic resonance and induced optical absorption spectra of fluoro-aluminate glasses, prepared under various redox conditions, which contained NH4HF2, EuF3 or Eu2O3. Analysis of the spectra seen after γ-irradiation to various doses, and the isothermal bleaching kinetics of individual absorption bands, indicated that the color centers responsible for induced absorption in the ultra-violet spectral region were hole traps that were related to O (45000 and 42000/cm) or F (37500/cm). Three absorption bands were revealed in the visible range. It was assumed that the 17400/cm absorption was due to an electron trap that involved Y3+. The data suggested that paramagnetic hole centers and electronic color centers could be formed in the same events.

Irradiation-Induced and Post-Irradiation Processes in Fluoroaluminate Glasses. T.V.Bocharova, G.O.Karapetyan, A.M.Mironov, N.M.Mishchenkov, N.O.Tagiltseva: Inorganic Materials, 2006, 42[6], 671-80