HDPE Sheet
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Summary:High density polyethylene thick plate can not only effectively slow down fast neutrons, but also is a good neutron shielding material. Because the static mass of neutrons is 1.0086649u and that of hydrogen atoms (protons) is 1.007825u, the atomic mass of neutrons is similar to that of hydrogen atoms, so when fast neutrons collide elastically with hydrogen nuclei in the shield, it is easiest to transfer energy to hydrogen nuclei and lose energy, thus slowing down fast neutrons into slow neutrons and thermal neutrons.
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High density polyethylene thick plate can not only effectively slow down fast neutrons, but also is a good neutron shielding material. Because the static mass of neutrons is 1.0086649u and that of hydrogen atoms (protons) is 1.007825u, the atomic mass of neutrons is similar to that of hydrogen atoms, so when fast neutrons collide elastically with hydrogen nuclei in the shield, it is easiest to transfer energy to hydrogen nuclei and lose energy, thus slowing down fast neutrons into slow neutrons and thermal neutrons.
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