Publish Time: 2021-06-04 Origin: Site
New boron-containing material BPE
A new type of shielding material was prepared by doping boron carbide into polyethylene. The new boron-containing material was experimentally explored for the particle size of doped boron carbide and the distribution state of boron carbide in the prepared sample. Finally, the sample was tested with a neutron source. The shielding performance was investigated, and the influence of material thickness on shielding effect was explored. The application of new boron-containing polyethylene composite materials in nuclear protection engineering provides strong data support and lays a foundation for further. Radiation protection mainly depends on the application of shielding materials and development. Traditional shielding materials such as concrete and steel plates cannot meet the requirements of modern shielding materials due to poor shielding performance and low flexibility. Boron carbide has become an important shielding material.
Polyethylene is a hydrocarbon containing a large number of hydrogen atoms, the hydrogen content can reach 7.92 x 1022 atoms/cm'3 [1], and it is a good fast neutron moderator. However, due to the continuous elastic collision of neutrons with hydrogen nuclei in the material, the energy lost is eventually slowed down into thermal neutrons, and thermal neutrons have to travel a certain diffusion distance in the material before they can be absorbed by the material.