This paper presents result of a study on radiation damage and recovery for lead tungstate
crystals produced at BTCP and SIC. Correlations were observed between initial light output and
initial longitudinal transmittance at 360 nm, between the loss of longitudinal transmittance at 440
nm and the loss of light output, and between radiation damages levels at different dose rates. No
correlations, however, were found between crystal’s initial optical properties and radiation hardness.
Excellent linearity was observed between the variations of crystal’s light output and its longitudinal
transmittance at 440 nm in several cycles of irradiation followed by recovery, indicating these PWO
crystals can be monitored in situ at LHC
