C. Dambrosio et al., LOW DOSE-RATE IRRADIATION SET-UP FOR SCINTILLATING CRYSTALS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 388(1-2), 1997, pp. 119-126
With a 1 Ci Co-60-source we measured the radiation damage and its reco
very in PbWO4 crystals. The method consists in measuring the anode cur
rent produced in the silicon diode of a Hybrid PhotoMultiplier Tube (H
PMT) during the irradiation of the crystal. At regular time intervals,
we took photon counting spectra with the same HPMT. By checking the r
esulting channel positions of the photoelectron peaks, we controlled t
he stability of our experimental set-up. Temperature control and monit
oring were achieved by forced thermostatized water circulation inside
the irradiation box and by using a PT100 and two AD590 temperature pro
bes. First results on irradiations of a few PbWO4 crystals are present
ed and future plans are communicated.