Simulation Study of Cold Neutron Difference Imaging

Cold neutron radiography lies in that neutrons react with 6Li nucleus in the scintillator to produce charged alpha particles,which interact with fluorescent material and yield photons;hence the photons distribution is recorded by detector.The paper introduces briefly the character of cold neutron radiography,gives the macroscopic total section with different neutron energy,and simulates neutron images of different energy by MC,which indicates the contrast difference below and above Bragg cut-off,processes the neutron images by difference imaging,which shows the advantages of the cold neutron radiography.

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