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Study of an unfolding algorithm for D-T neutron energy spectra measurement using a recoil proton method

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【作者】王洁；卢小龙；严岩；韦峥；王俊润；冉建玲；黄智武；兰长林；姚泽恩；沈飞；梁天骄；

【Author】 WANG Jie;LU Xiao-Long;YAN Yan;WEI Zheng;WANG Jun-Run;RAN Jian-Ling;HUANG Zhi-Wu;LAN Chang-Lin;YAO Ze-En;SHEN Fei;LIANG Tian-Jiao;School of Nuclear Sciences and Technology,Lanzhou University;Engineering Research Center for Neutron Application,Ministry of Education,Lanzhou University;Institute of High Energy Physics,Chinese Academy of Sciences;

【机构】 School of Nuclear Sciences and Technology,Lanzhou University； Engineering Research Center for Neutron Application,Ministry of Education,Lanzhou University； Institute of High Energy Physics,Chinese Academy of Sciences；

【摘要】 A proton recoil method for measuring D-T neutron energy spectra using polyethylene film and a Si(Au)surface barrier detector is presented. An iteration algorithm for unfolding the recoil proton energy spectrum to the neutron energy spectrum is investigated. The response matrices R of the polyethylene film at angles of 0o and45o were obtained by simulating the recoil proton energy spectra from mono-energetic neutrons using the MCNPX code. With an assumed D-T neutron spectrum, the recoil proton spectra from the polyethylene film at angles of 0oand 45owere also simulated using the MCNPX code. Based on the response matrices R and the simulated recoil proton spectra at 0oand 45o, the respective unfolded neutron spectra were obtained using the iteration algorithm,and compared with the assumed neutron spectrum. The results show that the iteration algorithm method can be applied to unfold the recoil proton energy spectrum to the neutron energy spectrum for D-T neutron energy spectra measurement using the recoil proton method.更多还原

【Abstract】 A proton recoil method for measuring D-T neutron energy spectra using polyethylene film and a Si(Au)surface barrier detector is presented. An iteration algorithm for unfolding the recoil proton energy spectrum to the neutron energy spectrum is investigated. The response matrices R of the polyethylene film at angles of 0o and45o were obtained by simulating the recoil proton energy spectra from mono-energetic neutrons using the MCNPX code. With an assumed D-T neutron spectrum, the recoil proton spectra from the polyethylene film at angles of 0oand 45owere also simulated using the MCNPX code. Based on the response matrices R and the simulated recoil proton spectra at 0oand 45o, the respective unfolded neutron spectra were obtained using the iteration algorithm,and compared with the assumed neutron spectrum. The results show that the iteration algorithm method can be applied to unfold the recoil proton energy spectrum to the neutron energy spectrum for D-T neutron energy spectra measurement using the recoil proton method.更多还原

【关键词】 D-T neutron source； recoil proton energy spectrum； D-T neutron energy spectrum； iteration algorithm method；
【Key words】 D-T neutron source； recoil proton energy spectrum； D-T neutron energy spectrum； iteration algorithm method；

【基金】 Supported by National Natural Science Foundations of China(11375077,21327801);National Key Scientific Instrument And Equipment Development Project(2013YQ40861)

【文献出处】 Chinese Physics C ,中国物理C , 编辑部邮箱 ,2015年07期

【分类号】O571.53
【被引频次】3
【下载频次】47

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