气-固分离前后裂变产物样品的γ能谱模拟
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摘要
针对裂变产物气-固分离前后样品测量的预先评估需求,建立了相应的γ能谱模拟方法。采用修改独立产额数据库的方法实现了气-固分离前后裂变产物的活度计算,根据HPGe探测器测量γ能谱的原理推导了γ能峰面积计算公式,进而结合蒙特卡罗模拟软件和Power Builder10.0编程工具编制了模拟程序。利用该程序分别模拟了裂变产物无损测量和气体裂变产物测量能谱,结果与实测能谱基本相符。
According to the prediction requirement of the measurement of fission product samples before and after the gas-solid separation,a simulation method for γ-ray spectrum measurement was established. With the way of modifying the independent yield database,all fission product activities before and after the gas-solid separation could be calculated. A universal calculation formula for the γ-ray peak areas was also deduced on the basic principle of gamma measurement by HPGe detector. Combining with above work,a simulation program was developed by employing Monte Carlo simulation code and Power Builder10. 0 programming tool. The spectra of nondestructive analysis and gaseous fission product measurement were simulated. The results are consistent with those of experiments.
According to the prediction requirement of the measurement of fission product samples before and after the gas-solid separation,a simulation method for γ-ray spectrum measurement was established. With the way of modifying the independent yield database,all fission product activities before and after the gas-solid separation could be calculated. A universal calculation formula for the γ-ray peak areas was also deduced on the basic principle of gamma measurement by HPGe detector. Combining with above work,a simulation program was developed by employing Monte Carlo simulation code and Power Builder10. 0 programming tool. The spectra of nondestructive analysis and gaseous fission product measurement were simulated. The results are consistent with those of experiments.
引文
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[3]谢占军,毛永,阮向东,等.基于蒙特卡罗方法模拟计算CZT探测器的γ能谱[J].核电子学与探测技术,2008,8(1):54-56.XIE Zhanjun,MAO Yong,RUAN Xiangdong,et al.Simulation of gamma-ray spectrum in CZT detector based on Monte Carlo method[J].Nuclear Electronic&Detection Technology,2008,8(1):54-56(in Chinese).
[4]曲德成,杨国山,常永福.裂变缓发γ能谱的蒙特卡罗模拟[J].原子能科学技术,2008,42(4):305-307.QU Decheng,YANG Guoshan,CHANG Yongfu.Monte-Carlo simulation of energy spectrum of delayed fissionγ-ray[J].Atomic Energy Science and Technology,2008,42(4):305-307(in Chinese).
[5]倪建忠,余功硕,刘杰,等.裂变产物通用活度计算程序的开发[J].原子能科学技术,2015,49(11):2 083-2 086.NI Jianzhong,YU Gongshuo,LIU Jie,et al.Universal program develop for calculation of fission product activity[J].Atomic Energy Science and Technology,2015,49(11):2 083-2 086(in Chinese).
[6]BRIESMEISTER J F.MCNPTM:A general Monte Carlo N-particle transport code(4C)[R].New Mexico,US:LANL,2000.
[7]陈明,杨劲松.Power Builder高级编程技术[M].北京:希望电子出版社,2002.
[8]倪建忠,刘杰,张佳媚,等.一个将MCNP模拟结果转换为Gamma Vision能谱的程序[J].核电子学与探测技术,2010,30(10):1 294-1 296.NI Jianzhong,LIU Jie,ZHANG Jiamei,et al.A program converting MCNP simulation into gamma vision spectra[J].Nuclear Electronic&Detection Technology,2010,30(10):1 294-1 296(in Chinese).
[9]Java-based nuclear information software(version 3.0)[DB/CD].USA:OECD Nuclear Energy Agency,CSNSM-Orsay,University of Birmingham,2007.
[10]ORTEC.Gamma vision 32 gamma-ray spectrum analysis and MCA emulator for Microsoft Windows95,98,and NT A66-B32 software user’s manual software version 5.2[R].USA:ORTEC,2000.