Investigation into the effects of indium, and the purity of precursor materials on the scintillation yield of cerium-doped heavy metal fluoride glasses for electromagnetic calorimetry in particle physics
Kw. Bell et al., Investigation into the effects of indium, and the purity of precursor materials on the scintillation yield of cerium-doped heavy metal fluoride glasses for electromagnetic calorimetry in particle physics, J NON-CRYST, 257, 1999, pp. 42-47
The properties of heavy metal fluoride glasses have been investigated to as
sess the potential for using these materials to construct electromagnetic c
alorimeters for particle physics. We report here on measurements of scintil
lation yield, transmission and decay time, on large blocks of CeF3-doped Hf
F4-based glasses. The effects of sample temperature, the addition of Ce and
In, ZrF4 concentrations, and different HfF4 feedstocks, have also been stu
died. The samples were excited by a high energy proton beam and the associa
ted scintillation yield and time structure was measured. The optical transm
ission of the samples was measured. It was observed that by comparing the t
ime dependence of scintillation yield with optical transmission, the relati
ve contributions of quenching and absorption in reducing optical yield coul
d be separated. It was concluded that variations in HfF4 feedstock purity c
an be a dominant factor in determining affective scintillation yield of lar
ge glass samples. (C) 1999 Elsevier Science B.V. All rights reserved.