Title :
A Study on Radiation Damage in Large Size LSO and LYSO Crystal Samples
Author :
Chen, Jianming ; Mao, Rihua ; Zhang, Liyuan ; Zhu, Ren-Yuan
Author_Institution :
California Inst. of Technol., Pasadena, CA
fDate :
Oct. 29 2006-Nov. 1 2006
Abstract :
This paper presents a study on radiation damage effect in large size (2.5times2.5times20 cm3) LSO and LYSO crystals. Optical and scintillation properties, including the longitudinal transmittance and emission spectra, the light output and light response uniformity with PMT and APD readout, are measured before and after gamma-ray irradiations with integrated dosage up to 106 rad for three LSO and LYSO samples from different vendors. It was found that the recovery of radiation damage under room temperature is negligible, indicating that radiation damage in LSO and LYSO crystals are not dose rate dependent. It was also found that the overall radiation damage in LSO and LYSO crystals is small as compared to other crystal scintillators commonly used in high energy and nuclear physics experiments.
Keywords :
avalanche photodiodes; gamma-ray effects; light transmission; luminescence; lutetium compounds; photomultipliers; solid scintillation detectors; APD readout; LSO crystal; LYSO crystal; PMT; emission spectra; gamma-ray irradiation; light output; light response uniformity; longitudinal transmittance spectra; lutetium oxyorthosilicate; lutetium yttrium oxyorthosilicate; optical property; radiation damage; scintillation property; Biomedical optical imaging; Cerium; Integrated optics; Manufacturing; Nuclear and plasma sciences; Nuclear physics; Photonic crystals; Stimulated emission; Temperature dependence; Yttrium; Crystal; Emission; Light Output; Lutetium Oxyorthosilicate; Lutetium Yttrium Oxyorthosilicate; Radiation Damage; Scintillator; Transmission;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2006. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-0560-2
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2006.356041
