Title :
Radiation Damage in CWO Scintillation Crystals With Different Defects
Author :
Tupitsyna, Irina A. ; Grinyov, Boris V. ; Katrunov, Konstantin A. ; Nagornaya, Ljudmila L. ; Onishchenko, Genadiy M.
Author_Institution :
Inst. for Scintillation Mater., Nat. Acad. of Sci. of Ukraine, Kharkov, Ukraine
Abstract :
Results are reported on the effects of gamma-radiation upon scintillation characteristics of CdWO4(CWO) single crystals with different defects. The defect structure before irradiation determines the radiation-induced changes of the CWO crystals. In some CWO samples, the dose of 103 Gy caused destruction of defects responsible for induced absorption. Doping by Li leads to reduction of defects responsible for color and trapping centers in CWO crystals. The annealing in a reductive medium (H2) or doping with Me3+ significantly increases radiation stability of CWO.
Keywords :
annealing; cadmium compounds; colour centres; doping; gamma-ray detection; gamma-ray effects; lithium; solid scintillation detectors; CdWO4:Li; annealing; color centers; doping; gamma-radiation effects; radiation damage; radiation stability; scintillation crystals; trapping centers; Annealing; Crystals; Doping; Electromagnetic wave absorption; Heating; Luminescence; Pulse measurements; Solid scintillation detectors; Stability; Testing; Cadmium tungstate; defects; radiation damage; scintillation crystals;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2009.2027600
