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

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

doi:10.1088/1674-1137/39/7/076201

Chinese Physics C> 2015, Vol. 39> Issue(7) : 076201 DOI: 10.1088/1674-1137/39/7/076201

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

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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 0° and 45° 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 0° and 45° were also simulated using the MCNPX code. Based on the response matrices R and the simulated recoil proton spectra at 0° and 45°, 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.

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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 and LIANG Tian-Jiao. Study of an unfolding algorithm for D-T neutron energy spectra measurement using a recoil proton method[J]. Chinese Physics C, 2015, 39(7): 076201. doi: 10.1088/1674-1137/39/7/076201

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Received: 2014-10-22
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沈阳化工大学材料科学与工程学院沈阳 110142

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

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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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