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Light Output and Radiation Damage in A Lead Tungstate Crystal

Published online by Cambridge University Press:  21 February 2011

J.A. Kierstead ,
S.P. Stoll  and
C.L. Woody
J.A. Kierstead
Affiliation:
Physics Department Brookhaven National Laboratory
S.P. Stoll
Affiliation:
Physics Department Brookhaven National Laboratory
C.L. Woody
Affiliation:
Physics Department Brookhaven National Laboratory
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Abstract

The optical absorption, light output and effects of radiation damage have been studied ina 2.2 × 2.2 × 12.8 cm3 crystal of lead tungstate. The crystal exhibits a longitudinal attenuation length which varies from roughly 13 cm to 1.5 m over the region where the scintillation emission occurs (400-800 nm). The light yield produces approximately 10 photoelectrons per MeV on a photomultiplier tube with a bialkali photocathode. The scintillation and light transmission properties of the crystal were characterized before and after exposure to 1 Mrad of 60Co gamma rays. Significant radiation induced optical absorption was observed in this crystal, along with a considerable amount of phosphorescence after irradiation. Partial spontaneous recovery from the damage occurred at room temperature, and it was possible to induce additional recovery by optical bleaching.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 348 , 1994 , 475
Copyright
Copyright © Materials Research Society 1994

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References

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