摘要
To obtain multiple monoenergetic neutron sources and realize the on-site calibration of radiation monitoring equipment for nuclear-involved places,the structural characteristics and neutron source features of D-T neutron tube were analyzed;Monte Carlo method was adopted to simulate the effect of interaction between typical materials and different energy neutrons;multilayered shielding materials were combined and optimized to acquire the optimal scheme to shield the neutron sources from the neutron tube.On the base,a tapered alignment filtration construction was designed and Monte Carlo method was employed to simulate the effect of alignment construction.The result showed that the tapered alignment filtration construction can create monoenergetic neutrons including14.1 MeV,0.18 MeV and thermal neutrons and demonstrated good monochrome performance which provides multiple monoenergetic sources for the on-site calibration.
To obtain multiple monoenergetic neutron sources and realize the on-site calibration of radiation moni-toring equipment for nuclear-involved places, the structural characteristics and neutron source features of D-T neutron tube were analyzed; Monte Carlo method was adopted to simulate the effect of interaction between typical materials and different energy neutrons; multilayered shielding materials were combined and optimized to acquire the optimal scheme to shield the neutron sources from the neutron tube. On the base, a tapered alignment filtration construction was designed and Monte Carlo method was employed to simulate the effect of alignment construction. The result showed that the tapered alignment filtration construction can create monoenergetic neutrons including14.1 MeV, 0.18 MeV and thermal neutrons and demon-strated good monochrome performance which provides multiple monoenergetic sources for the on-site calibration.
