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| The Primary Standard of Neutron Source Strength |
| ZHANG Hui,GONG Xiao-ming,ZHANG Ya-nan,FAN Cheng |
| National Institute of Metrology, Beijing 100029, China |
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Abstract The manganese bath method is used to absolute measure the neutron emission rate of a radionuclide neutron source, the primary standard can be used to transfer the neutron emission rate. The primary standard is composed of a sphere manganese bath with an inner diameter of 110cm, a gamma measurement system with 2 NaI sensors, a set of solution circulation system and a shielding lead chamber. The modified primary standard participated in the key comparison (BIPM CCRI(III)-K9.Am-Be.1) organized by BIPM, the comparison is equivalent and provided a technical basis for the international recognition of the measurement result of neutron emission rate.
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Received: 20 April 2020
Published: 18 October 2021
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［1］JJF 1035-2006电离辐射计量术语及定义.
［2］张锋, 袁超, 黄隆基. 中国同位素中子源测井技术与应用进展［J］. 同位素, 2011,(1): 12-19.
Zhang F, Yuan C, Huang L J. Progress of isotope neutron source logging technology and application in China［J］. Isotope, 2011,(1): 12-19.
［3］刘镇洲, 陈金象. Am-Be中子源辐射场周围剂量当量与吸收剂量的计算［J］. 原子能科学技术, 2009, 43(1): 11-15.
Liu Z Z, Chen J X. Calculation of dose equivalent and absorbed dose around radiation field of Am-Be neutron source［J］. Atomic Energy Science and Technology, 2009, 43(1): 11-15.
［4］Marie M, Christophe D, Xavier M, et al. Mini Table of Radionuclides ［M］. France EDP Sciences, 2015.
［5］卢希庭. 原子核物理(第2版)［M］. 北京:原子能出版社, 2000.
［6］Spiegel V. Neutron Source Calibration at NBS for Calibration Checks of Neutron Radiation Instruments: NBS SP456［R］. NBS,1976.
［7］李春娟, 刘毅娜, 张伟华, 等. 锰浴法测量中子源发射率中各修正因子的蒙特卡罗计算［J］. 原子能科学技术, 2014, 48(10): 1876-1881.
Li C J, Liu Y N, Zhang W H, et al. Monte Carlo calculation of correction factors for radionuclide ueutron source emissivity by manganese bath method［J］. Atomic Energy Science and Technology, 2014, 48(10): 1876-1881.
［8］Croft S, Favalli A. How the choice of data reduction can strongly influence uncertainty assessment: A re-analysis of Mn-bath experiments［J］. Radiation Measurements, 2012, 47(7): 481-485.
［9］丁大钊, 叶春堂, 赵志祥, 等. 中子物理学-原理、方法与应用［M］. 北京:原子能出版社, 2005.
［10］Roberts N J , Moiseev N N, Kralik M. Radionuclide neutron source characterization techniques［J］. Metrologia, 2001,48: S239-S252.
［11］Roberts N J. MCNP Calculations of Correction Factors for Radionuclide Neutron Source Emission Rate Measurements Using the Manganese Bath: NPL REPORT CIRM45［R］. NPL, 2001.
［12］李春娟, 陈军, 吴海成, 等. 238U裂变电离室修正因子及探测响应的蒙特卡罗模拟计算［J］. 原子能科学技术, 2009, 43(3): 208-214.
Li C J, Chen J, Wu H C, et al. Monte Carlo simulation of correction factor and detection response of 238U fission ionization chamber［J］. Atomic Energy Science and Technology, 2009, 43(3): 208-214.
［13］Khabaz R . Appraisement of the correction factors for neutron reaction in the manganese bath using Monte Carlo calculation［J］. Journal of Radioanalytical & Nuclear Chemistry, 2012, 293(2):455-462.
［14］李德红,黄建微,沙比哈·吐尔逊, 等. g因子的蒙特卡罗模拟计算［J］. 计量学报, 2019, 40(5): 920-923.
Li D H,Huang J W,Shabiha Tuerxun, et al. Monte Carlo Simulation Method for g Factor［J］. Acta Metrologica Sinica, 2019, 40(5): 920-923.
［15］许淑艳. 蒙特卡罗方法在实验核物理中的应用［M］. 北京:原子能出版社, 2006.
［16］Roberts N J , Jones L N , Wang Z, et al. International key comparison of measurements of neutron source emission rate(1999 2005): CCRI(Ⅲ)-K9.AmBe［J］. Metrologia, 2011, 48(1A): 06018. |
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2021, Vol. 42 
