Calibration of LS301 Fastneutron Detector Efficiency

ZHANG Wen-hui; LI Guang-wu; #; ZHANG Gang; CHEN Yu; YAN Guo-hong

doi:10.11804/NuclPhysRev.28.02.195

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Article Navigation > Nuclear Physics Review > 2011 > 28(2): 195-199

ZHANG Wen-hui, LI Guang-wu, #, ZHANG Gang, CHEN Yu, YAN Guo-hong. Calibration of LS301 Fastneutron Detector Efficiency[J]. Nuclear Physics Review, 2011, 28(2): 195-199. doi: 10.11804/NuclPhysRev.28.02.195

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ZHANG Wen-hui, LI Guang-wu, #, ZHANG Gang, CHEN Yu, YAN Guo-hong. Calibration of LS301 Fastneutron Detector Efficiency[J]. Nuclear Physics Review, 2011, 28(2): 195-199. doi: 10.11804/NuclPhysRev.28.02.195

Calibration of LS301 Fastneutron Detector Efficiency

doi: 10.11804/NuclPhysRev.28.02.195

1 China Institute of Atomic Energy, Beijing 102413, China;2 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;3 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;4 Institute of Modern Physics, Shanxi Normal University, Linfen 041004, Shanxi, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2011-06-20

Abstract

Neutron detection efficiency of LS301 fastneutron detector was calibrated by measuring the neutron energy spectrum of 252Cf source, which has a standard fission neutron spectrum. A low mass, fast ionization chamber is used as the fission fragments detector in the timeofflight(TOF) spectrometer and afforded the start signal of neutron flight. The stop signal was offered by the anode of LS301. A measured TOF spectrum was turned to the neutron energy spectrum which will be compared with the standard one. Consequently, the fastneutron detection efficiency of LS301 was obtained. Calibration procedures of experimental and data processing was given. Relative detection efficiencies were obtained separately for threshold settings of 0.5, 0.7, 1.0 and 1.6 MeV for neutron energies under 10 MeV. Experimental results accorded with theoretical efficiency curves which were calculated with the Monte Carlo code NEFF50.
- ²⁵²Cf chamber,
- LS301 fast neutron detector,
- neutron detection efficiency,
- time of flight
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Calibration of LS301 Fastneutron Detector Efficiency

doi: 10.11804/NuclPhysRev.28.02.195

1 China Institute of Atomic Energy, Beijing 102413, China;2 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;3 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;4 Institute of Modern Physics, Shanxi Normal University, Linfen 041004, Shanxi, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2011-06-20

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Abstract:
Neutron detection efficiency of LS301 fastneutron detector was calibrated by measuring the neutron energy spectrum of 252Cf source, which has a standard fission neutron spectrum. A low mass, fast ionization chamber is used as the fission fragments detector in the timeofflight(TOF) spectrometer and afforded the start signal of neutron flight. The stop signal was offered by the anode of LS301. A measured TOF spectrum was turned to the neutron energy spectrum which will be compared with the standard one. Consequently, the fastneutron detection efficiency of LS301 was obtained. Calibration procedures of experimental and data processing was given. Relative detection efficiencies were obtained separately for threshold settings of 0.5, 0.7, 1.0 and 1.6 MeV for neutron energies under 10 MeV. Experimental results accorded with theoretical efficiency curves which were calculated with the Monte Carlo code NEFF50.

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