NEW HIGH-DENSITY FLUORIDE GLASSES DOPED WITH CEF3

Fluoride grasses have very good optical transparency. With reasonably high density, they may serve as good candidates for fast scintillators . In this work, a group of high-density fluoride glasses has been deve loped and doped with CeF3. The density, index of refraction, chemical stability, ultraviolet (UV)/visible transmission, fluorescence spectra and decay time were measured, and the effects of various components o n the fluorescence light yield were studied. It is shown that the gras ses have very high densities and low UV cut-offs. Some of the glasses have strong fluorescence light yield, and the decay time is between 20 and 30 ns. The fluorescence spectra of the glasses are compared with those of a commercially obtained EGO (Bi4Ge3O12) crystal.