One of the main ways to produce nuclear track-etched membrane is irradiating solid membranes with the fission fragments produced by nuclear reactor.In order to opti-mize the production process parameters of nuclear track-etched membranes and provide theoretical guidance for nuclear track-etched membrane production,a simulation program is developed based on Geant4 to simulate the process of nuclear track-etched membrane produced by nuclear reactor.The physical process of generation and emission of neutron-induced Uranium 235 fission fragments are studied,and the energy and angular distribu-tions of fission fragments under different thicknesses of the target are analyzed and calculat-ed.The thickness of the Uranium target and solid membrane are optimized theoretically.It can be concluded that a 4 μm thick Uranium target has the highest emission intensity of fission fragments.The maximum thickness of the solid membranes is about 8 μm,which is limited by the range of fission fragments.
关键词
核孔膜/Geant4/蒙特卡洛模拟
Key words
nuclear track-etched membrane/Geant4/Monte Carlo simulation
维普
万方数据