留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

面向个人剂量计校准的小尺度伽玛参考辐射模拟研究

钱易坤 冯鹏 刘易鑫 朱亚地 黄宇晨 张颂 何鹏 魏彪 毛本将

钱易坤, 冯鹏, 刘易鑫, 等. 面向个人剂量计校准的小尺度伽玛参考辐射模拟研究[J]. 强激光与粒子束. doi: 10.11884/HPLPB202032.200280
引用本文: 钱易坤, 冯鹏, 刘易鑫, 等. 面向个人剂量计校准的小尺度伽玛参考辐射模拟研究[J]. 强激光与粒子束. doi: 10.11884/HPLPB202032.200280
Qian Yikun, Feng Peng, Liu Yixin, et al. Personal dosimeter calibration based on minitype reference radiation[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202032.200280
Citation: Qian Yikun, Feng Peng, Liu Yixin, et al. Personal dosimeter calibration based on minitype reference radiation[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202032.200280

面向个人剂量计校准的小尺度伽玛参考辐射模拟研究

doi: 10.11884/HPLPB202032.200280
基金项目: 重庆大学中央高校基本科研业务费资助项目(2018CDGFGD0008);国家自然科学基金青年基金项目(11805111);国防科工局研究课题
详细信息
    作者简介:

    钱易坤(1992—),男,博士研究生,从事电离辐射计量研究;626578507@qq.com

    通讯作者:

    毛本将(1965—),男,研究员,从事电离辐射计量研究;gena@vip.sina.com

  • 中图分类号: TL72

Personal dosimeter calibration based on minitype reference radiation

  • 摘要: 针对伽玛射线个人剂量计基于标准伽玛参考辐射进行校准时检定效率低、校准工作复杂和需要远程送检的关键技术问题,建构了1 Ci 137Cs放射源小尺度参考辐射场物理模型,采用蒙特卡罗方法,研究了小尺度参考辐射场内的剂量分布、装置结构和待检剂量计变化导致散射射线对剂量场的影响,获得了待检剂量计形状、数量、类型和装置结构产生的散射伽玛射线对小尺度参考辐射量值定度的影响结果。研究结果表明,1 Ci 137Cs可以为小尺度参考辐射辐射场检验点提供1.5 mSv/h的伽玛遂行剂量率,辐照个人剂量计载台直径30 cm束斑上的剂量率相对标准偏差约为0.48%。当载台厚度为20 mm时,散射射线对小尺度参考辐射检验点处剂量率值的影响率为3.27%,高于剂量计尺寸(1.62%)和剂量计数量(0.56%)的影响。
  • 图  1  伽玛射线剂量校准MRR物理模型原理图

    Figure  1.  Physical models of MRR for Gamma-ray dose calibration

    图  2  沿射线束照射方向检验点剂量率分布情况

    Figure  2.  Distribution of dose rate along the irradiation direction

    图  3  载台厚度变化对检验点处散射射线能量的影响

    Figure  3.  Gamma energy spectrum with different thickness of stage at the point of test

    图  4  剂量计尺寸变化对检验点处散射射线能量的影响

    Figure  4.  Gamma spectra at the point of test with the size change of dosimeters

    图  5  剂量计数量变化对检验点处散射射线能量的影响

    Figure  5.  Gamma spectra at the point of test with the number change of dosimeters

    图  6  不同情况下散射监测点处的散射能谱

    Figure  6.  Spectrum at scattering monitory point

    图  7  不同因素变化对监测点的伽玛能谱的影响情况

    Figure  7.  Scattering spectrum at scattering monitory point under different conditions

    表  1  载台厚度对检验点剂量率值影响一览表

    Table  1.   The impact rate of the stage thickness on the dose rate of the point of test

    thickness of stage/mmdose rate at the point of test/(mSv/h)influence rate/%error/%
    51.3831.140.11
    101.3952.000.11
    151.4042.700.11
    201.4123.270.11
    251.4193.780.11
    301.4244.200.11
    351.4304.570.09
    401.4344.900.09
    下载: 导出CSV

    表  2  剂量计尺寸对检验点剂量率值影响一览表

    Table  2.   The impact rate of the dosimeter size on the dose rate of the point of test

    size of dosimeter/mmdose rate at the point of test/(mSv/h)influence rate/%error/%
    10×3×81.4271.620.03
    8×3×81.4191.080.04
    8×3×61.4110.460.04
    8×3×41.397-0.470.05
    8×2×41.4140.700.05
    8×1×41.4201.110.05
    下载: 导出CSV

    表  3  剂量计数量对检验点剂量率值影响情况一览表

    Table  3.   The impact rate of the dosimeter number on the dose rate of the point of test

    number of dosimeter/mmdose rate at the point of test/(mSv/h)influence rate/%error/%
    11.4000.100.10
    21.4010.150.09
    41.4020.240.10
    81.4070.560.11
    下载: 导出CSV

    表  4  不确定度因素分析

    Table  4.   Analysis of uncertainty factors

    uncertainty factorsreference conditionserror value/%uncertainty component/%
    MRR box 60 cm×60 cm×60 cm 0.08 0.05
    thickness change of stage 20 mm 3.27 1.89
    size change of dosimeters 10 mm×3 mm×8 mm 1.62 0.94
    number change of dosimeters 8 0.56 0.32
    combined standard uncertainty 3.20
    下载: 导出CSV
  • ISO 4037-1: 1996, X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy—Part 1: Radiation characteristics and production methods[S].
    ISO 4037-2: 1997, X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy—Part 2: Dosimetry for radiation protection over the energy ranges 8 keV to 1.3 MeV and 4 MeV to 9 MeV[S].
    ISO 4037-3: 1999, X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photo energy—Part 3: Calibration of area and personal dosemeters and the measurement of their response as a function of energy and angle of incidence[S].
    ISO 4037-4: 2004, X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photo energy—Part 4: Calibration of area and personal dosemeters in low energy X reference radiation fields[S].
    Leitner A, Witzani J, Boutillon M, et al. International comparisons of air kerma standards in 137Cs gamma radiation[J]. Metrologia, 1997, 34(2): 169. doi: 10.1088/0026-1394/34/2/8
    Allisy-Roberts P J, Burns D T, Takata N, et al. Comparison of the standards for air kerma of the NMIJ and the BIPM for 137Cs γ rays[R]. Rapport International Bureau of Weights and Measures, 2004, 12: 1-8.
    Allisy-Roberts P J, Kessler C, Burns D T, et al. Comparison of the standards for air kerma of the LNE-LNHB and the BIPM for 137Cs gamma radiation[J]. Metrologia, 2009, 46(1A): P06011.
    Kessler C, Roger P, Allisy-Roberts P J, et al. Comparison of standards for air kerma of the KRISS and the BIPM for 137Cs gamma radiation[J]. Metrologia, 2010, 47(1A): P06022.
    Kessler C, Allisy-Roberts P J, Burns D T, et al. Comparison of the standards for air kerma of the ITN (Portugal) and the BIPM for 137Cs γ-rays[J]. Metrologia, 2009, 47(1A): P06007.
    Liu Yixin, Wei Biao, Zhuo Renhong, et al. Determination of the conventional true value of gamma-ray air kerma in a minitype reference radiation[J]. Applied Radiation and Isotopes, 2016, 118: 238-245. doi: 10.1016/j.apradiso.2016.09.018
    Liu Yixin, Wei Biao, Xu Yang, et al. Feasibility study on determining the conventional true value of gamma-ray air kerma in a minitype reference radiation[J]. Nuclear Science and Techniques, 2017, 28(6): 3-7.
    徐阳, 魏彪, 毛本将, 等. 基于蒙特卡罗的小尺度参考辐射装置屏蔽研究[J]. 强激光与粒子束, 2016, 28:096004. (Xu Yang, Wei Biao, Mao Benjiang, et al. Shielding research of minitype reference radiation device based on Monte Carlo simulation[J]. High Power Laser and Particle Beams, 2016, 28: 096004 doi: 10.11884/HPLPB201628.160018
    Li Wenjie, Liu Yixin, Wei Biao, et al. Monte Carlo simulation investigation on the minitype reference radiation employed for the calibration of gamma ray dose or dose rate meters[J]. Journal of Radiological Protection, 2018, 38(1): 407-421. doi: 10.1088/1361-6498/aa9fb9
    IEC 61526: 2010, Radiation protection instrumentation—Measurement of personal dose equivalents Hp(10) and Hp(0.07) for X, gamma, neutron and beta radiations—Direct reading personal dose equivalent meters[S].
  • 加载中
计量
  • 文章访问数:  66
  • HTML全文浏览量:  40
  • PDF下载量:  4
  • 被引次数: 0
出版历程
  • 收稿日期:  2020-10-11
  • 修回日期:  2021-01-19
  • 网络出版日期:  2021-03-09

目录

    /

    返回文章
    返回