摘要
使用提拉法获得了?80 mm×200 mm级Ce∶LYSO晶体,分析了影响晶体开裂和回熔的原因,并测试了晶体的闪烁性能。尺寸为17 mm×17 mm×17 mm头尾样品的光输出达到30400 ph./Me V和30000 ph./Me V,能量分辨率为9.4%和8.7%,衰减时间为41.7 ns和40.3 ns,表明该晶体具有优良的闪烁性能和光学均匀性。
Ce∶ LYSO crystal with size of ?80 mm × 200 mm was obtained by Czochralski method. The reasons affecting crystal cracking and melting back were analyzed and the crystal scintillation performance were tested. The light output of the head and tail samples with a size of 17 mm × 17 mm × 17 mm reaches30400 ph./Me V and 30000 ph./Me V,with energy resolution of 9. 4% and 8. 7%,and decay time of41. 7 ns and 40. 3 ns, indicating that the crystal has good scintillation performance and optical uniformity.
引文
[1]张形,刘明哲,刘彦韬,等.影响LYSO∶Ce晶体余辉强度的几个主要因素[J].人工晶体学报,2016,45(7):1787-1790.
[2]Cooke D W,Mc Clellan K J,Bennett B L,et al.Crystal growth and optical characterization of cerium-doped Lu1.8Y0.2Si O5[J],Journal of Applied Physics,2000,88(12):7360-7362.
[3]严成锋,赵广军,张连翰,等.大尺寸Ce∶Lu1.6Y0.4Si O5闪烁晶体的生长和光谱特性[J].无机材料学报,2005,20(6):1301-1305.
[4]Qin L S,Li H Y,Lu S,et al.Growth and characteristics of LYSO(Lu2(1-x-y)Y2xSi O5∶Cey)scintillation crystals[J],Journal of Crystal Growth,2005,281:518-524.
[5]王佳,岑伟,李和新,等.大尺寸闪烁晶体Ce∶LYSO的生长[J].压电与声光,2013,35(3):401-407.
[6]Mao R H,Zhang L Y,Zhu R Y.Quality of a 28 cm Long LYSO Crystal and Progress on Optical and Scintillation Properties[J],IEEE Transactions on Nuclear Science,2012,59(5):2224-2228.
[7]秦来顺,陆晟,李焕英,等.硅酸镥闪烁晶体的生长与缺陷研究[J].人工晶体学报,2004,33(6):999-1003.
[8]丁雨憧.谐振泵浦1.5微米波段掺铒硅酸盐激光晶体的生长及性能研究[D].上海:中国科学院上海光学精密机械研究所,2012.
[9]崔素贤,郑燕青,施尔畏,等.高温闪烁晶体Ce∶LSO的生长研究[J].人工晶体学报,2002,31(6):521-524.
[10]曾繁明,孙晶,李建利,等.Nd∶GGG晶体生长与开裂研究[J].人工晶体学报,2005,34(2):332-335.
[11]狄聚青.Nd掺杂石榴石混晶和离子掺杂CGA晶体的生长和性能研究[D].上海:中国科学院上海光学精密机械研究所,2014.
[12]秦来顺.硅酸镥晶体生长与闪烁性能研究[D].上海:中国科学院上海硅酸盐研究所,2006.
[13]周文平,牛微,刘旭东,等.闪烁晶体C∶LYSO的研究进展和发展方向[J].材料导报,2015,29(25):214-218.
[14]王佳,岑伟,徐扬,等.高发光均匀性Ce∶LSO闪烁晶体的研制[J].压电与声光,2016,38(3):405-408.
[15]Mao R H,Wu C,Dai L E,et al.Crystal growth and scintillation properties of LSO and LYSO crystals[J].Journal of Crystal Growth,2013,368:97-100.
[16]Chen J M,Zhang L Y,Zhu R Y.Large Size LYSO Crystals for Future High Energy Physics Experiments[J].IEEE Transactions on Nuclear Science,2005,52(6):3133-3140.
