中子俘获反应截面在线测量技术研究

石斌, 彭猛, 张奇玮, 贺国珠, 周祖英, 唐洪庆

石斌, 彭猛, 张奇玮, 贺国珠, 周祖英, 唐洪庆. 中子俘获反应截面在线测量技术研究[J]. 原子能科学技术, 2018, 52(9): 1537-1544. DOI: 10.7538/yzk.2017.youxian.0817
引用本文: 石斌, 彭猛, 张奇玮, 贺国珠, 周祖英, 唐洪庆. 中子俘获反应截面在线测量技术研究[J]. 原子能科学技术, 2018, 52(9): 1537-1544. DOI: 10.7538/yzk.2017.youxian.0817
SHI Bin, PENG Meng, ZHANG Qiwei, HE Guozhu, ZHOU Zuying, TANG Hongqing. Online Method for Neutron Capture Reaction Cross-section Measurement[J]. Atomic Energy Science and Technology, 2018, 52(9): 1537-1544. DOI: 10.7538/yzk.2017.youxian.0817
Citation: SHI Bin, PENG Meng, ZHANG Qiwei, HE Guozhu, ZHOU Zuying, TANG Hongqing. Online Method for Neutron Capture Reaction Cross-section Measurement[J]. Atomic Energy Science and Technology, 2018, 52(9): 1537-1544. DOI: 10.7538/yzk.2017.youxian.0817

中子俘获反应截面在线测量技术研究

Online Method for Neutron Capture Reaction Cross-section Measurement

  • 摘要: 利用γ全吸收型4π BaF2探测装置,对中子俘获反应截面进行了在线测量。基于HI-13串列加速器提供的脉冲化质子束,通过7Li(p,n) 7Be反应产生中子,构建了keV能区中子源实验条件,经屏蔽准直后的中子轰击样品,应用4π BaF2装置在线测量(n,γ)反应复合核退激时释放的瞬发γ射线级联,测量了Au、C、Nb、空白等样品。通过计算93Nb(n,γ)94Nb和197Au(n,γ)198Au两个反应的截面数据比值并与文献数据比对,检验了4π BaF2探测装置和(n,γ)反应截面在线测量技术,为在中国散裂中子源(CSNS)上顺利开展(n,γ)反应截面数据测量工作提供了技术支持。

     

    Abstract: The γ-ray total absorption BaF2 facility was used to measure the neutron capture reaction crosssection with high precision. An experimental neutron source condition of keV energy region was set up through the 7Li(p,n)7Be reaction, based on the HI-13 tandem accelerator providing the pulsed proton beam. By using the total absorption BaF2 facility and online method, the prompt γ-ray cascades were detected when the neutron bombarded sample after shielding and collimation. Samples of Au, C, Nb and the blank were measured. The facility was checked and the online method for the (n,γ) reaction cross-section measurement was tested by comparing the deduced reaction cross-section ratio of 197Au(n,γ)198Au to 93Nb(n,γ)94Nb with the reference data. It also provides technical support for the implementation of (n, γ) reaction cross-section measurement at China Spallation Neutron Source (CSNS).

     

  • [1] ALPIZAR-VICENTE A M, BREDEWEG T A, ESCH E I. Neutron capture cross section of 62Ni at s-process energies[J]. Physical Review C, 2008, 77(1): 1-5.
    [2] WISSHAK K, VOSS F, ARLANDINI C. Neutron capture on 180Tam: Clue for an s-process origin of nature’s rarest isotope[J]. Physical Review Letters, 2001, 87(25): 1-4.
    [3] WONG-NG W, LEVIN I, COOK L P, et al. Nature of the transient BaF2 related phases in the BaF2 processing of Ba2YCu3O7-x superconductors[J]. Applied Physics Letters, 2006, 88(10): 102507-1-102507-3.
    [4] CLEMENS H, STROMBERGER U, WEILGUNI P C, et al. Growth of BaF2 and of BaF2/SrF2 layers on (001) oriented GaAs[J]. Journal of Applied Physics, 1989, 66(4): 1680-1686.
    [5] ZHONG Qiping, ZHOU Zuying, TANG Hongqing, et al. New detector system to measure (n,γ) reaction cross section precisely in China[J]. Chinese Physics C, 2008, 32(Suppl.): 102-105.
    [6] 马霄云,仲启平,周祖英,等. 大体积氟化钡的性能测试[J]. 原子能科学技术,2009,43(2):180-184.MA Xiaoyun, ZHONG Qiping, ZHOU Zuying, et al. Performance test of large BaF2 detector[J]. Atomic Energy Science and Technology, 2009, 43(2): 180-184(in Chinese).
    [7] 张奇玮. 基于全吸收型探测器的中子俘获反应截面测量方法的研究[D]. 北京:中国原子能科学研究院,2015.
    [8] 张奇玮,贺国珠,阮锡超,等. 锂玻璃探测器中子探测效率的刻度[J]. 原子核物理评论,2013,30(2):156-160.ZHANG Qiwei, HE Guozhu, RUAN Xichao, et al. Calibration of neutron detection efficiency of Li-glass detector[J]. Nuclear Physics Review, 2013, 30(2): 156-160(in Chinese).
    [9] LAVAL M, MOSZYNSKI M, ALLENAND R, et al. Barium fluoride-inorganic scintillator for subnanosecond timing[J]. Nuclear Instruments and Methods in Physics Research, 1983, 206: 169-172.
    [10] 贺国珠. BaF2闪烁体探测器(n,γ)反应截面测量的研究[D]. 兰州:兰州大学,2006.
    [11] User manual Agilent Acqiris 21-SLOT CPCI crate[EB/OL]. [2016-01-25]. http:∥cp.literature.agilent. com/litweb/pdf/U109290019.pdf.
    [12] Programmer’s guide Agilent Acqiris instruments[EB/OL]. [2016-02-10]. http:∥research.physics.illinois.edu/bezryadin/labprotocol/ProgrammersGuide.pdf.
    [13] Programmer’s reference manual: Agilent Acqiris instruments[EB/OL]. [2016-2-15]. http:∥cp.literature.agilent.com/litweb/pdf/U1092-90002.pdf.
    [14] 赵健. GTAF装置数字化数据获取系统的研究[D]. 衡阳:南华大学,2013.
    [15] 彭猛,贺国珠,骆宏,等. 4π BaF2装置的触发系统研究[J]. 原子能科学技术,2016,50(10):1866-1870.PENG Meng, HE Guozhu, LUO Hong, et al. Study of trigger system for γ-ray total absorption BaF2 facility[J]. Atomic Energy Science and Technology, 2016, 50(10): 1866-1870(in Chinese).
    [16] 黄兴. GTAF装置数字化数据离线分析方法研究[D]. 衡阳:南华大学,2015.
    [17] 彭猛. 硫中子俘获治疗中子源技术研究[D]. 兰州:兰州大学,2017.
    [18] CHADWICK M B, HERMAN M, OBLO?INSK P, et al. ENDF/B-Ⅶ.1 nuclear data for science and technology: Cross sections, covariances, fission product yields and decay data[J]. Nuclear Data Sheets, 2011, 112(12): 2887-2996.
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出版历程
  • 刊出日期:  2018-09-19

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