强激光与粒子束, 2018, 30 (3): 036005, 网络出版: 2018-05-29  

叠层碲锌镉探测器制备及γ能谱特性测试

Fabrication and γ spectrum characteristic test of a laminated CdZnTe detector
作者单位
西南科技大学 核废物与环境安全国防重点学科实验室, 四川 绵阳 621010
摘要
实验制备了单层和叠层(双层)碲锌镉探测器,并利用241Am@59.54 keV和57Co@122 keV γ射线源测试了其γ能谱特性。相比单层探测器,对于较高能量的57Co@122 keV γ射线,叠层碲锌镉探测器表现出较高的探测效率和光峰值效率,较好地改善了康普顿连续统一体,表现出与整块等厚度碲锌镉探测器类似的性能;但光生载流子收集效率变差,能谱峰位向低道区偏移;能量分辨率未得到改善。实验初步表明,通过叠加方法制备叠层碲锌镉探测器是可行的,并可推断制备更大厚度的叠层探测器将有利于中高能γ射线能谱测量。
Abstract
Single layer and laminated (double layer) CdZnTe detectors were prepared and their gamma spectrum characteristics were tested using 241Am@59.54 keV and 57Co@122 keV gamma ray sources. Compared with the single layer detector, for the higher energy gamma rays of 57Co@122 keV, the laminated CdZnTe detectors exhibited higher detection efficiency and light peak efficiency, and improved the Compton continuum, showing similar performance to that of a single-layered CdZnTe detector of the same thickness; but charge carriers collection efficiency became worse, and the peak position of the energy spectrum shifted to lower channel area; energy resolution was not improved. The experimental results show that it is feasible to prepare the laminated CdZnTe detector by stacking method, and it can be inferred that the preparation of stacked detectors of larger thickness will be beneficial for mid- and high-energy gamma ray spectrometry.
参考文献

[1] 艾宪芸, 魏义祥. 室温半导体CdZnTe(CdTe)探测器性能综述[J]. 核电子学与探测技术, 2004, 24(3): 325-329. (Ai Xianyun, Wei Yixiang. Basic characterization of CdZnTe(CdTe) detectors. Nuclear Electronics & Detection Technology, 2004, 24(3): 325-329)

[2] 黄勇, 杨磊, 杨汝基, 等. 碲化镉(CdTe)探测器的原理及医学应用[J]. 上海生物医学工程, 2005, 26(4): 221-225. (Huang Yong, Yang Lei, Yang Ruji, et al. The principle of cadmium telluride(CdTe) detector and medical application. Shanghai Journal of Biomedical Engineering, 2005, 26(4): 221-225)

[3] 丁洪林, 罗丛, 张万昌. CdTe、CdZnTe核辐射探测器的制备性能和应用[C]//全国第十二届核电子学与核探测技术学术年会论文集. 2004: 88-91. (Ding Honglin, Luo Cong, Zhang Wanchang. Characteristics and applications of CdTe/CdZnTe nuclear detectors. Proceedings of the 12th National Conference on Nuclear Electronics & Detection Technology. 2004: 88-91)

[4] 朱世富, 赵北君, 王瑞林, 等. 室温半导体核辐射探测器新材料及其器件研究[J]. 人工晶体学报, 2004, 33(1): 6-12. (Zhu Shifu, Zhao Beijun, Wang Ruilin, et al. Studies of new materials and devices for room-temperature nuclear radiation detectors. Journal of Synthetic Crystals, 2004, 33(1): 6-12)

[5] Liptac J, Parker R, Tang V, et al. Hard X-ray diagnostic for lower hybrid experiments on Alcator C-Mod[J]. Rev Sci Instr, 2006, 77: 103504.

[6] Min Jiahua, Sang Wenbin, Liu Hongtao, et al. Improving the properties of CdZnTe crystals by annealing processes[J]. Rare Metal Materials and Engineering, 2007, 36(3): 471-473.

[7] 张岚, 李元景, 朱维彬, 等. 碲锌镉探测器对低能X射线的探测[J]. 核电子学与探测技术, 2009, 29(3): 517-520. (Zhang Lan, Li Yuanjing, Zhu Weibin, et al. Detection of CdZnTe detectors to low energy photons. Nuclear Electronics & Detection Technology, 2009, 29(3): 517-520)

[8] Xu Huichao, Cheng Cheng, Zhao Cuilan. Characteristics of a prototype CdZnTe detector[J]. Nuclear Science and Techniques, 2007, 18(6): 358-361.

[9] Sellin P J, Davies A W, Gkoumas S, et al. Ion beam induced charge imaging of charge transport in CdTe and CdZnTe[J]. Nucl Instrum Meth B, 2008, 266(8): 1300-1306.

[10] Xu Yadong, Jie Wanqi, Sellin P J, et al. Study on temperature dependent resistivity of indium-doped cadmium zinc telluride[J]. J Phys D: Appl Phys, 2009, 42: 03505.

[11] Meng L J, Tan J W, Spartiotis K, et al. Preliminary evaluation of a novel energy resolved photon counting gamma ray detector[J]. Nucl Instrum Methods Phys Res A, 2009, 604(3): 548-554.

[12] 沈敏, 肖沙里, 张流强, 等. 不同厚度像素CdZnTe探测器的性能测试和评估[J]. 强激光与粒子束, 2014, 26: 034001. (Shen Min, Xiao Shali, Zhang Liuqiang, et al. Experiment and simulation of performance characteristics for pixellated CdZnTe detectors with various thickness. High Power Laser and Particle Beams, 2014, 26: 034001)

[13] 徐亚东, 王昌盛, 谷亚旭, 等. 载流子输运性能对CdZnTe晶体脉冲X射线响应特性的影响[J]. 功能材料, 2014, 45(24): 24078-24081. (Xu Yadong, Wang Changsheng, Gu Yaxu, et al. Effects of charge carrier transport properties on pulse X ray response characteristics of CdZnTe crystals. Functional Material, 2014, 45(24): 24078-24081)

[14] 王闯, 查钢强, 齐阳, 等. CdZnTe像素探测器的制备与表征[J]. 原子能科学技术, 2015, 49(7): 1320-1324. (Wang Chuang, Cha Gangqiang, Qi Yang, et al. Fabrication and characterization of CdZnTe pixel detector. Atomic Energy Science and Technology, 2015, 49(7): 1320-1324)

[15] 李杨, 罗文芸, 贾晓斌, 等. 平面型CdZnTe探测器电荷收集效率对能谱测量的影响[J]. 上海大学学报, 2016, 22(2): 231-237. (Li Yang, Luo Wenyun, Jia Xiaobin, et al. Influence of charge collection efficiency on energy spectrum for planar CdZnTe detector. Journal of Shanghai University (Natural Science), 2016, 22(2): 231-237)

席发元, 宋凤军. 叠层碲锌镉探测器制备及γ能谱特性测试[J]. 强激光与粒子束, 2018, 30(3): 036005. Xi Fayuan, Song Fengjun. Fabrication and γ spectrum characteristic test of a laminated CdZnTe detector[J]. High Power Laser and Particle Beams, 2018, 30(3): 036005.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!