CsI(Tl)晶体的α/γ 波形数字化实时甄别

李奎念; 李斌康; 张美; 李阳

doi:10.7498/aps.63.202901

摘要

基于CsI（Tl）探测器对α/γ 粒子的波形甄别能力，采用电荷比较法设计了一种波形实时甄别系统. 介绍了实时甄别系统的设计原理，利用60Co-γ源、241Am-α源对实时系统进行了甄别实验，探究了不同参数对甄别效果的影响，并给出了最优甄别效果下的参数设置. 研究表明，设计的数字化实时波形甄别系统体积小，能准确、实时地甄别开α/γ粒子，最佳品质因子大于1.4，事件计数率可达3× 105/s.

关键词:

A real-time α/γ pulse shape discriminator based on CsI(Tl) scintillators is developed. The charge comparison method is adopted as an inserted algorithm. In this paper, the design scheme of the system is introduced and the real-time system is tested with a 60Co-γ source and a 241Am-α source. The influence of parameter setting on the discrimination result is investigated and the best parameter setting is provided. The results show that the designed real-time system has a small size. The best figure of merits is above 1.4. The system can discriminate α/γ events exactly and its counting rate of events can achieve 3×105 per second.

Keywords:

作者及机构信息

1.
西北核技术研究所, 西安 710024

基金项目: 国家自然科学基金（批准号：11105106）资助的课题.

Authors and contacts

1.
Northwest Institute of Nuclear Technology, Xi'an 710024, China

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 11105106).

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施引文献

[1]	Roush M L, Wilson M A, Hornyak W F 1964 Nucl. Instrum. Methods Phys. Res. Sect. A 31 112
[2]	Mellow B D, Aspinall M D, Mackin R O, Joyce M J, Peyton A J 2007 Nucl. Instrum. Methods Phys. Res. Sect. A 578 191
[3]	Yousefi S, Lucchese L, Aspinall M D 2009 Nucl. Nucl. Instrum. Methods Phys. Res. Sect. A 598 551
[4]	Liu Q, Fang J Q, Zhao G, Li Y 2012 Acta Phys. Sin. 61 130508 (in Chinese) [刘强, 方锦清, 赵耿, 李永 2012 61 130508]
[5]	Esposito B, Riva M, Marocco D, Kaschuck Y 2007 Nucl. Instrum. Methods Phys. Res. Sect. A 572 355
[6]	Riva M, Esposito B, Marocco D, Belli F 2009 23rd IEEE/NPSS Symposium on Fusion Engineering San Diego, UAS, June 1-5, 2009 p1
[7]	Kim H J, Kim E J, Kim S Y 2008 Nuclear Science Symposium Conference Record Dresden, Germany, October 19-25, 2008 p2917
[8]	Joyce M J, Aspinall M D, Cave F D, Lavietes A D 2011 Advancements in Nuclear Instrumentation Measurement Methods and Their Applications (ANIMMA), June 6-9, 2011 p1
[9]	Lee P S, Lee C S, Lee J H 2013 Radiat. Measur. 48 12
[10]	Li W B, Qiao W M, Jing L, Lin F Y, Jiao X X 2011 Nucl. Elec. Tron. Dect. Tech. 30 1450 (in Chinese) [李伟斌, 乔卫民, 敬岚, 林飞宇, 焦喜香 2011 核电子学与探测技术 30 1450]
[11]	Pu C Y, Liu T Y, Liu C J, Bai X M, Li C P, She H 2010 Acta Phys. Sin. 59 453 (in Chinese) [濮春英, 刘廷禹, 刘长捷, 白晓明, 李春萍, 佘辉 2010 59 453]
[12]	Xiong D L, Wang M S, Yang C L, Tong X F, Ma N 2010 Chin. Phys. B 19 103303
[13]	Yuan Y G, Lei J R, Bai L X 2010 Atom. Energy Sci. Technol. 44 735 (in Chinese) [袁永刚, 雷家荣, 白立新 2010 原子能科学技术 44 735]
[14]	Zhu Y F, Lin S T, Deniz M, Liao H Y, Li H B, Li Y L, Wong H T 2005 Nucl. Instrum. Methods Phys. Res. Sect. A 557 490
[15]	Dangtip S, Atac A, Bergenwall B, Blomgren J, Elmgren K, Johansson C, Lebrun C 2000 Nucl. Instrum. Methods Phys. Res. Sect. A 452 484
[16]	Chen G Y, Xin Y, Huang F C, Wei Z Y, Lei S J, Huang S B, Zhu L, Zhao J W, Ma J Y 2012 Acta Phys. Sin. 61 082901 (in Chinese) [陈国云, 辛勇, 黄福成, 魏志勇, 雷升杰, 黄三玻, 朱立, 赵经武, 马加一 2012 61 082901]
[17]	Liu Y T, Chen D F 2013 Physics 42 534 (in Chinese) [刘蕴韬, 陈东风 2013 物理 42 534]
[18]	Bao W 2013 Chin. Phys. B 22 087405
[19]	Schiffer R T, Flaska M, Pozzi S A, Carney S, Wentzloff D D 2011 Nucl. Instrum. Methods Phys. Res. Sect. A 652 491

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