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Flat energy response silver activation detector developed its strong X, γ field neutron fluence measurement

Author: FanRuiFeng
Tutor: MaJingFang
School: Chinese Academy of Engineering Physics
Course: Nuclear Energy Science and Engineering
Keywords: pulsed neutron neutron activation neutron flux photonuclear reaction
CLC: TL816
Type: Master's thesis
Year: 2004
Downloads: 85
Quote: 0
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This paper describes a silver activation detector, which has been built and calibrated to measure the mixed X, Y ,n pulsed radiate fields. This detection system is composed of silver foil, G-M counter, polyethylene moderators, shielding harness of scattering neutron etc. Its modular design allows several efficiency vs. energy responses is the almost same from 0.144MeV to 14MeV. Calibration coefficients obtained for two distances and six neutron energies based on the method for stopping the radiation after the detector is saturated using an accelerator-type neutron source. The detector efficiency is 8.4x10’7 to 1.2x10-6 from 0.144MeV to 14.8MeV and 1.1xl0-6~1.2xl0-6 from 0.144MeV to 5MeV. Its uncertainty is below 10%. This detection system then is used in the LIA of 12MeV to measure the neutron flux of (X,n) reaction and obtained that neutron yield is 2.6x109~3.7x109n/pulse.

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CLC: > Industrial Technology > Nuclear technology > Particle detection,radiation detection and nuclear instrumentation > Radiation detection technology and instrumentation > Neutrons and other radiation detectors
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