Title :
Observation of fast scintillation light in a PbF2:Gd crystal
Author :
Woody, C.L. ; Stoll, S.P. ; Kierstead, J.A.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
A weak scintillation emission has been observed in a lead fluoride crystal doped with 0.15% gadolinium (PbF2:Gd). The scintillation is produced by two emission peaks, one at ~278 nm, and another at ~311 nm, which, when combined with the Cherenkov light produced in the crystal, results in a total light yield of 4-6 photoelectrons per MeV on a bialkali photocathode phototube. This is approximately 3-4 times the intensity of the pure Cherenkov light produced in an undoped lead fluoride crystal. The decay time for the observed light output was found to be ~18 ns with no appreciable slow component. The total light yield of PbF2:Gd is comparable to that of lead tungstate, and, because of the lack of a slow component, could make it attractive for certain high rate applications
Keywords :
gadolinium; lead compounds; scintillation; solid scintillation detectors; 18 ns; 278 nm; 311 nm; Cherenkov light; PbF2:Gd; PbF2:Gd crystal; bialkali photocathode phototube; decay time; fast scintillation light; high rate applications; light output; total light yield; weak scintillation emission; Calorimetry; Cathodes; Electromagnetic wave absorption; Glass; Laboratories; Lead; Optical materials; Photoelectricity; Photomultipliers; Testing;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.510392
