原位定向γ能谱测量方法
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摘要
在铀矿床上进行原位定向γ能谱测量时,复杂几何条件下的非定向γ射线会干扰测量结果。为减小上述影响,提出一种定向比例系数法,分别进行了模拟测量和实际测量比对,验证分析测量方法。首先,通过MCNP5程序模拟计算获得铅屏蔽层的定向比例系数和最佳厚度。然后,在Na I探测器的四周包裹铅对标准铀矿模型进行测量。最后,将测量结果与模拟值进行对比。结果表明:采用定向比例系数法进行铀矿原位定向γ能谱测量能有效能减少非定向γ射线对测量结果带来的干扰,可进一步提高铀矿原位γ能谱测量的精度。
When in situ gamma-ray spectrometry is carried out on uranium deposits,the non-directional gammaray under complex geometric conditions will cause great interference to the measurement results. In order to eliminate the above-mentioned effects,a directional proportional coefficient method was proposed,which was used to verify the analytical measurement method by comparing the simulated measurement with the actual measurement.The optimum thickness and directional proportional coefficient of the lead shielding layer were obtained by MCNP5 simulation. The standard uranium ore model is measured by using the lead-encapsulated NaI detector. The measured results are compared with the simulated values. The results show that the directional proportional coefficient measurement method proposed can effectively eliminate the interference of non-directional gamma rays on the measurement results and further improve the accuracy of in-situ gamma-ray spectrum measurement of uranium deposits.
When in situ gamma-ray spectrometry is carried out on uranium deposits,the non-directional gammaray under complex geometric conditions will cause great interference to the measurement results. In order to eliminate the above-mentioned effects,a directional proportional coefficient method was proposed,which was used to verify the analytical measurement method by comparing the simulated measurement with the actual measurement.The optimum thickness and directional proportional coefficient of the lead shielding layer were obtained by MCNP5 simulation. The standard uranium ore model is measured by using the lead-encapsulated NaI detector. The measured results are compared with the simulated values. The results show that the directional proportional coefficient measurement method proposed can effectively eliminate the interference of non-directional gamma rays on the measurement results and further improve the accuracy of in-situ gamma-ray spectrum measurement of uranium deposits.
引文
1张文宇,周四春,张国亚.粤北某铀矿勘查区地气测量与γ能谱方法异常特征分析[J].科学技术与工程,2015,15(28):120-124Zhang Wenyu,Zhou Sichun,Zhang Guoya. Anomalous characteristics of ground gas survey and gamma-ray spectrometry in a uranium exploration area in northern Guangdong[J]. Science Technology and Engineering,2015,15(28):120-124
2 刘悦,从卫克.世界铀资源、生产及需求概况[J].世界核地质科学,2017,34(4):200-206Liu Yue,Cong Weike. A survey of world uranium resources,production and demand[J]. World Nuclear Geology Science,2017,34(4):200-206
3 周全之.世界核电发展现状及前景展望[J].大众用电,2018,32(6):25-26Zhou Quanzhi. World nuclear power development stat-us and prospects[J]. Popular Utilization of Electricity,2018,32(6):25-26
4 Li Y Q. Research on evolution path of innovation chain of nuclear power industry-based on innovation synergy[C]//Proceeding of 2018International Conference on power,Energy and Environmental Engineering(ICPEEE 2018). Wuhan:Advanced Science and Industry Research Center,2018:23294
5 严文勋,封亚辉,李建军,等.基于泊位旁安装γ探测器的进口有色金属矿远程放射性研究[J].中国辐射卫生,2013,22(5):530-533Yan Wenxun,Feng Yahui,Li Jianjun,et al. Study on remote radiation monitoring of imported non-ferrous metal ores byγ-ray detectors fixed beside berth[J]. Chinese Journal of Radiological Health,2013,22(5):530-533
6 胡波,杨奎,张文宇,等.某铀矿勘察区的地气与放射性场研究[J].科学技术与工程,2015,15(26):120-123Hu Bo,Yang Kui,Zhang Wenyu,et al. The study of the gas and radioactive field in an uranium exploration area[J]. Science Technology and Engineering,2015,15(26):120-123
7 梁亚林.测井资料在含煤地层铀矿评价中的应用[J].西部探矿工程,2018,30(8):29-30Liang Yalin. Application of accelerometer and magnetic flux gate for orientation in the directional probe[J]. West China Exploration Engineering,2018,30(8):29-30
8 胡波,张文宇,杨奎,等. MCNP程序在坑道定向γ能谱探测技术中的应用研究[J].核电子学与探测技术,2015,32(2):146-149Hu Bo,Zhang Wenyu,Yang Kui,et al. Applied research in the trenches directionalγspectroscopy detection techniques based on MCNP[J]. Nuclear Electronics and Detection Technology,2015,32(2):146-149
9 郭慧霞.定向γ辐射仪器的研制[D].北京:中国地质大学,2013Guo Huixia. The development of directionalγradiateon measuring instrument[D]. Beijing:China University of Geosciences,2013
10 Forster R A,Godfrey T N K. MCNP-A general monte-carlo code for neutrons and photon transport[J]. Lecture Notes in Physics,1985,240(10):33-55
11 许淑艳.蒙特卡罗方法在实验核物理中的应用[M]. 2版.北京:原子能出版社,2006Xu Shuyan. Application of Monte Carlo method in experimental nuclear physics[M]. 2nd ed. Beijing:Atomic Press,2006
12 毛乃昌,毛利南,赵葆玲.β-γ反符合法测铀研究[J].核电子学与探测技术,1983(3):39-47Mao Naichang,Mao Linan,Zhao Baoling. A study on determination of uranium content based onβ-γanti-coincidence technique[J].Nuclear Electronics and Detection Technology,1983(3):39-47
2 刘悦,从卫克.世界铀资源、生产及需求概况[J].世界核地质科学,2017,34(4):200-206Liu Yue,Cong Weike. A survey of world uranium resources,production and demand[J]. World Nuclear Geology Science,2017,34(4):200-206
3 周全之.世界核电发展现状及前景展望[J].大众用电,2018,32(6):25-26Zhou Quanzhi. World nuclear power development stat-us and prospects[J]. Popular Utilization of Electricity,2018,32(6):25-26
4 Li Y Q. Research on evolution path of innovation chain of nuclear power industry-based on innovation synergy[C]//Proceeding of 2018International Conference on power,Energy and Environmental Engineering(ICPEEE 2018). Wuhan:Advanced Science and Industry Research Center,2018:23294
5 严文勋,封亚辉,李建军,等.基于泊位旁安装γ探测器的进口有色金属矿远程放射性研究[J].中国辐射卫生,2013,22(5):530-533Yan Wenxun,Feng Yahui,Li Jianjun,et al. Study on remote radiation monitoring of imported non-ferrous metal ores byγ-ray detectors fixed beside berth[J]. Chinese Journal of Radiological Health,2013,22(5):530-533
6 胡波,杨奎,张文宇,等.某铀矿勘察区的地气与放射性场研究[J].科学技术与工程,2015,15(26):120-123Hu Bo,Yang Kui,Zhang Wenyu,et al. The study of the gas and radioactive field in an uranium exploration area[J]. Science Technology and Engineering,2015,15(26):120-123
7 梁亚林.测井资料在含煤地层铀矿评价中的应用[J].西部探矿工程,2018,30(8):29-30Liang Yalin. Application of accelerometer and magnetic flux gate for orientation in the directional probe[J]. West China Exploration Engineering,2018,30(8):29-30
8 胡波,张文宇,杨奎,等. MCNP程序在坑道定向γ能谱探测技术中的应用研究[J].核电子学与探测技术,2015,32(2):146-149Hu Bo,Zhang Wenyu,Yang Kui,et al. Applied research in the trenches directionalγspectroscopy detection techniques based on MCNP[J]. Nuclear Electronics and Detection Technology,2015,32(2):146-149
9 郭慧霞.定向γ辐射仪器的研制[D].北京:中国地质大学,2013Guo Huixia. The development of directionalγradiateon measuring instrument[D]. Beijing:China University of Geosciences,2013
10 Forster R A,Godfrey T N K. MCNP-A general monte-carlo code for neutrons and photon transport[J]. Lecture Notes in Physics,1985,240(10):33-55
11 许淑艳.蒙特卡罗方法在实验核物理中的应用[M]. 2版.北京:原子能出版社,2006Xu Shuyan. Application of Monte Carlo method in experimental nuclear physics[M]. 2nd ed. Beijing:Atomic Press,2006
12 毛乃昌,毛利南,赵葆玲.β-γ反符合法测铀研究[J].核电子学与探测技术,1983(3):39-47Mao Naichang,Mao Linan,Zhao Baoling. A study on determination of uranium content based onβ-γanti-coincidence technique[J].Nuclear Electronics and Detection Technology,1983(3):39-47