Abstract
The influence of fluorination of a batch mixture on the scintillation properties of fluorohafnate glasses in the HfF 4–BaF 2–CeF 3–AlF 3–NaF–InF 3 system was studied. A new technique of batch treatment, comprising additional fluorination by chlorine trifluoride and xenon difluoride in gaseous phase at the elevated temperatures was proposed. Transmission spectra before and after γ-irradiation as well as light yield of the glasses were studied. The radiation hardness of glasses is found to increase as a result of the fluorination treatment. It is suggested that the presence of reduced Hf 3+ ions and oxygen impurities should cause the formation of radiation colouring centres and decrease the radiation hardness of scintillating HfF 4-based glasses, doped with Ce 3+.
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