Title :
Radiation damage in undoped CsI and CsI (Tl)
Author :
Woody, C.L. ; Kierstead, J.A. ; Levy, P.W. ; Stoll, S.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
fDate :
8/1/1992 12:00:00 AM
Abstract :
Radiation damage in undoped CsI and CsI(Tl) crystals using 60 Co gamma radiation for doses up to ~4.2×106 has been studied. Samples from various manufacturers were measured, ranging in size from 2.54-cm-long cylinders to a 30-cm-long block. Measurements were made on the change in optical transmission and scintillation light output as a function of dose. Although some samples showed a small change in transmission, a significant change in light output was observed for all samples. Recovery from damage was also studied as a function of time and exposure to UV light. A short-lived phosphorescence was observed in undoped CsI, similar to the phosphorescence seen in CsI(Tl)
Keywords :
caesium compounds; radiation effects; scintillation counters; 60Co gamma radiation; CsI(Tl) crystals; UV light; optical transmission; phosphorescence; scintillation light output; undoped CsI; Crystals; Gamma rays; Laboratories; Manufacturing; Optical sensors; Phosphorescence; Purification; Radiation detectors; Size measurement; Time measurement;
Journal_Title :
Nuclear Science, IEEE Transactions on
