Yb: YAG晶体性能实验测量

严维鹏; 李斌康; 宋顾周; 段宝军; 姚志明; 宋岩; 韩长材; 许梦轩

doi:doi:10.11884/hplpb201729.170057

强激光与粒子束, 2017, 29 (8): 086002, 网络出版: 2017-06-30

Yb: YAG晶体性能实验测量

Characteristics measurement research of Yb: YAG crystal

论文大纲

严维鹏 ^1,*李斌康 ¹宋顾周 ¹段宝军 ¹姚志明 ¹宋岩 ¹韩长材 ¹许梦轩 ²

作者单位

¹ 西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室, 西安 710024

² 西安交通大学能源与动力工程学院, 西安 710049

摘要

为了测量脉冲时间宽度小于20 ns时的γ射线时间分辨图像, 发展了新型无机闪烁体Yb: YAG, 并实验测量了晶体的发光衰减时间、X射线激发发光光谱、相对发光效率和空间分辨等性能, 研究了Yb: YAG晶体的发光性能。实验表明, Yb: YAG发光有三种衰减成分, 快成分衰减常数为1.2 ns, 慢成分衰减常数与射线种类有关; X射线激发发光光谱在250~800 nm范围, 有三个发光峰, 分别为320, 380和500 nm, 且320 nm处强度最大; 相对发光效率为1900 ph/MeV; 使用钨分辨卡测得Yb: YAG空间分辨能力为2 lp/m, 使用刀口法测得空间调制传递函数为0.5时的频率为0.7 lp/mm。结果说明Yb: YAG晶体性能能够满足所需测量要求。

Abstract

In order to acquire time resolution image of γ-ray while impulse pulse width is under 20 ns, a new scintillator named Yb: YAG is developed, and its characteristics of luminescence decay time, excited luminescence spectrum of X-ray, relative luminescence efficiency and spatial resolution are measured. The measurement shows that there are three decay components. The fast decay constant comes to 1.2 ns, but the slow decay constant depends on radiation category. The excited luminescence spectrum ranges from 250 nm to 800 nm, and three peaks, 320 nm, 380 nm, 500 nm, exist. Meanwhile, the strongest intensity spectrum is located at 320 nm. The relative luminescence efficiency reaches 1900 ph/MeV. The spatial resolution is 2 lp/mm in the test with W resolution chart. The frequency is 0.7 lp/mm when the MTF is 0.5 in the test with edge image. The result shows that the characteristics of Yb: YAG crystal could satisfy the measurement demand.

参考文献

[1] 欧阳晓平. 脉冲辐射探测技术[J]. 中国工程科学, 2008, 10(4): 44-55.(Ouyang Xiaoping. Development of pulsed radiation detection technology. China Engineering Science, 2008, 10(4): 44-55)

[2] 于滢潆, 李明. 同步辐射光源截面测量用闪烁体的点扩散函数测定[J]. 核技术, 2011, 34(6)：423-426.(Yu Yingying, Li Ming. Determination of scintillator PSF for measuring source transverse sizes of synchrotron radiations. Nuclear Techniques, 2011, 34(6): 423-426)

[3] Morozov V A, Morozova N V, Zlokazov V B. Implementation of autocorrelation method for investigations of the scintillator decay time and space correlation of radiation[J]. Nuclear Instruments and Methods in Physics Research A, 2015, 775: 148-153.

[4] 杨培志, 邓佩珍, 徐军, 等. Yb: YAG晶体的闪烁特性[J]. 发光学报, 2005, 26(6): 723-725.(Yang Peizhi, Deng Peizhen, Xu Jun, et al. Scintillation properties of Yb: YAG crystal with different Yb3+ doped concentration. Chinese Journal of Luminescence, 2005, 26(6): 723-725)

[5] 杨培志, 廖晶莹, 殷之文. Yb: YAG闪烁晶体的UV发光特性[J]. 人工晶体学报, 2004, 33(5): 806-809.(Yang Peizhi, Liao Jingying, Yin Zhiwen. UV emission properties of Yb: YAG scintillation crystal. Journal of Synthetic Crystals, 2004,33(5): 806-809)

[6] Antoninia P, Belogurov S, Bressid G, et al. Scintillation properties of Yb-doped yttrium-aluminum garnets[J]. Nuclear Instruments and Methods in Physics Research A, 2002, 488: 591-603.

[7] Shim J B, Yoshikawa A, Nikl M, et al. Scintillation properties of the Yb-doped YAlO3 crystals[J]. Radiation Measurements, 2004, 38: 493-496.

[8] 刘金良, 刘芳, 欧阳晓平, 等. CsI(Na)晶体发光时间特性研究[J]. 应用物理, 2012, 3(4): 257-261.(Liu Jinliang, Liu Fang, Ouyang Xiaoping, et al. Study on the time characteristics of primary scintillation from CsI(Na) crystal. Applied Physics,2012, 3(4): 257-261)

[9] 黄展常, 杨建伦. 塑料闪烁体的闪烁时间特性[J]. 核技术, 2015, 38(6): 203-208.(Huang Zhanchang, Yang Jianlun. Decay time characteristics of plastic scintillator. Nuclear Techniques, 2015, 38(6): 203-208)

[10] Chen Jianming, Zhang Liyuan, Zhu Renyuan. Large Size LYSO crystals for future high energy physics experiments[J]. IEEE Trans Nuclear Science, 2005, 52(6): 3133-3140.

[11] Quarati F, Bos A J J, Brandenburg S, et al. X-ray and gamma-ray response of a 2″×2″ LaBr3: Ce scintillation detector[J]. Nuclear Instruments and Methods in Physics Research A, 2007, 574: 115-120.

[12] Ermis E E, Celiktas C, Denizli H. Comparison of resolving time values of different scintillation detectors in the coincidence experiments[J]. Radioanal Nucl Chem, 2013, 295: 1377-1383.

严维鹏, 李斌康, 宋顾周, 段宝军, 姚志明, 宋岩, 韩长材, 许梦轩. Yb: YAG晶体性能实验测量[J]. 强激光与粒子束, 2017, 29(8): 086002. Yan Weipeng, Li Binkang, Song Guzhou, Duan Baojun, Yao Zhiming, Song Yan, Han Changcai, Xu Mengxuan. Characteristics measurement research of Yb: YAG crystal[J]. High Power Laser and Particle Beams, 2017, 29(8): 086002.

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