A study on the radiation hardness of lead tungstate crystals

A study on the radiation hardness of lead tungstate crystals

This report presents recent progress of a study on the radiation damage in lead tungstate (PbWO/sub 4/) crystals. The dose rate dependence of radiation damage in PbWO/sub 4/ has been observed. An optimization of the oxygen compensation through post-growth thermal annealing has led to PbWO/sub 4/ sam...

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Veröffentlicht in:IEEE Transactions on Nuclear Science 1998-06, Vol.45 (3), p.686-691
Hauptverfasser: Zhu, R.Y., Deng, Q., Newman, H., Woody, C.L., Kierstead, J.A., Stoll, S.P.
Format: Artikel
Sprache:eng
Schlagworte:
ANNEALING
CERN LHC
Collision mitigation
CRYSTAL DEFECTS
Crystals
DOPED MATERIALS
INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS
Large Hadron Collider
Lead
LEAD TUNGSTATES
MATERIALS SCIENCE
PHYSICAL RADIATION EFFECTS
RADIATION DOSES
Silicon carbide
SOLID SCINTILLATION DETECTORS
Temperature
Testing
Time measurement
Transmission electron microscopy
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Zusammenfassung:This report presents recent progress of a study on the radiation damage in lead tungstate (PbWO/sub 4/) crystals. The dose rate dependence of radiation damage in PbWO/sub 4/ has been observed. An optimization of the oxygen compensation through post-growth thermal annealing has led to PbWO/sub 4/ samples with significantly improved radiation hardness. Front irradiation is found to cause a factor of 2 to 6 times less severe damage than uniform irradiation. Lanthanum doping was found not to be a determining factor for PbWO/sub 4/ radiation hardness improvement. Finally, a TEM/EDS analysis revealed that the radiation damage in PbWO/sub 4/ crystals is caused by oxygen vacancies.
ISSN:0018-9499
1558-1578
DOI:10.1109/23.682613