电流型探测器单粒子灵敏度标定的原理及应用

宋朝晖; 阮锡超; 代秋声; 王奎禄

强激光与粒子束, 2005, 17 (3): 453, 网络出版: 2006-04-28

电流型探测器单粒子灵敏度标定的原理及应用

Principle and application of sensitivity calibration by single particle for current detector

论文大纲

宋朝晖 ¹阮锡超 ²代秋声 ¹王奎禄 ¹

作者单位

¹ 西北核技术研究所,陕西,西安,710024

² 中国原子能科学研究院,核物理研究所,北京,102413

电流型探测器灵敏度标定电荷模数转换飞行时间法闪烁体 Current detector Sensitivity calibration Charge analog digital conversion Time-of-flight Scintillator

摘要

采用电荷模数转换记录单个脉冲电荷的方法,标定了单能射线在电流型闪烁探测器中产生的平均电流,从而得到其灵敏度.标定结果与传统的电流法在±8%的范围内一致.该标定方法准确度高,扣除本底容易,对标定源的强度要求也大大降低.加上飞行时间法,还可对粒子进行甄别,能在中子-γ射线混合场中将中子和γ射线的电荷贡献分开,得到探测器对每种射线单独的灵敏度.该方法适用于在单个脉冲电荷信噪比较高的场合下标定脉冲电流型探测器.

Abstract

A method adopting the charge analog digital conversion technique to calibrate a current scintillation detector is described. Each pulse charge produced by a single particle is collected and recorded. Calculating the mean current, the sensitivity of the detector is measured. The results agree with the measurement presented by the traditional direct current method within ±8%. This new method can get higher accuracy, subtract background easily and it does not depend on the intensity of the radiation source. By applying time-of-flight method, it is capable of particle discrimination. It can separate the pulse charge produced by neutron from that produced by gamma in a neutron-gamma mixed field. The sensitivity of current detector to each type of particle can be measured separately. This method is appropriate to calibrate the sensitivity of the pulse current detector when the single charge pulse has high signal-to-noise ratio.

参考文献

[1] 刘庆兆.脉冲辐射场诊断技术[M]. 北京:科学出版社,1994.158-164.
Liu Q Z. The diagnosis technology of pulse radiation field. Beijing: Science Press, 1994.158-164.

[2] АльбиковЗА,ВepeтeнниковАИ,КозловОВ. Pulse ionizing radiation detector. Beijing: Atomic Energy Press, 1983.74-97)

[3] 陈家斌, 冯杰, 郑志坚, 等.塑料闪烁探测器氘氚中子灵敏度标定[J].强激光与粒子束,1995,7(1):141-145.
Chen J B, Feng J, Zheng Z J, et al. The sensitivity calibration of the plastic scintillation detectors for DT neutrons. High Power Laser and Particle Beams, 1995,7(1):141-145.

[4] 胡孟春, 周殿忠, 李如荣, 等. CeF₃闪烁探测器γ灵敏度测量[A].第11届全国核电子学与探测技术年会论文集[C].2002.165-167.
Hu M C, Zhou D Z, Li R R, et al. The gamma rays sensitivity measurement of CeF₃ scintillator detector. Proceedings on nuclear electronics and detecting technologies.2002.165-167.

[5] 宋朝晖, 管兴胤, 代秋声, 等. 新型硅酸镥电流型闪烁探测器性能研究[J]. 原子能科学技术, 2004,38(s0):223-226.
Song Z H, Guan X Y, Dai Q S, et al. Study on a new current scintillation detector made up of Lutetium oxyorthosilicate.Atomic Energy Scinece and Technology, 2004,38(s0):223-226.

[6] 胡孟春, 叶文英, 彭太平, 等.一种对中子相对不灵敏的大动态脉冲γ辐射探测器[J].高能物理与核物理,2003,27(4):354-358.
Hu M C, Ye W Y, Peng T P, et al. A large dynamic range gamma radiation detector insensitive to neutron radiation. High Energy Physics and Nuclear Physics, 2003,27(4):354-358.

[7] 刘荣, 蒋励, 王玫, 等.在特定实验条件下的散射中子本底研究[J]. 核电子学与核探测技术,2001,21(4):241-243.
Liu R, Jiang L, Wang M, et al. Study on scattering neutron background under specific condition of experiment. Nuclear Electronics and Detection Technology, 2001,21(4):241-243.

[8] 胡孟春, 叶文英, 周殿忠, 等. CeF₃闪烁探测器对DD中子的相对灵敏度[J]. 强激光与粒子束, 2003,15(7):721-724.
Hu M C, Ye W Y, Zhou D Z, et al. DD neutron relative sensitivity of cerium fluoride scintillation detector. High Power Laser and Particle Beams,2003,15(7):721-724.

[9] 陈宇, 王子敬, 毛泽普, 等, 电荷比较法测量液体闪烁体n,γ分辨性能[J]. 高能物理与核物理, 1999,23(7):616-621.
Chen Y,Wang Z J, Mao Z P, et al.Charge comparison method used to discriminate photons and neutrons in liquid scintillators.High Energy Physics and Nuclear Physics, 1999,23(7):616-621.

[10] 叶邦角, Nanjyo H, Kobayashi T. NE213闪烁体的n,γ分辨[J]. 核技术, 2003,26(7):505-508.
Ye B J, Nanjyo H, Kobayashi T.n-γ discrimination of NE213 scintillator.Nuclear Techniques, 2003,26(7):505-508.

[11] Iwanczyk J S, Patt B E, Tull C R, et al. New LSO based scintillators[J]. IEEE Trans Nucl Sci, 2000,47(6):1781-1786.

宋朝晖, 阮锡超, 代秋声, 王奎禄. 电流型探测器单粒子灵敏度标定的原理及应用[J]. 强激光与粒子束, 2005, 17(3): 453. SONG Zhao-hui, RUAN Xi-chao, DAI Qiu-sheng, WANG Kui-lu. Principle and application of sensitivity calibration by single particle for current detector[J]. High Power Laser and Particle Beams, 2005, 17(3): 453.

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