Neutrons are one of the nucleons that make up the nucleus of an atom and are an indispensable component of the nucleus of an atom that is an indispensable component of chemical elements. Neutrons are particles made up of three quarks, two lower quarks and one upper quark. Neutrons are electrically neutral particles with tiny but non-zero magnetic moments, and they are not charged, making them an elementary particle. The rest mass of the neutron is 16748 10-27kg with a radius of about 08 10-15m, similar in size to proton. Neutrons are often represented by the symbol n.
Boron-containing polyethylene is a new type of radiation-proof material, which is based on polymer polyethylene with boron carbide material. This material has excellent radiation protection performance and neutron shielding effect, and can effectively absorb and scatter neutrons, so it is widely used in nuclear industry, medicine, military and other fields. Since boron carbide is a good neutron-absorbing element, adding boron carbide to polyethylene materials can significantly improve its ability to block neutrons. The boron-containing polyethylene (PE) generally has a boron carbide content of between 2% and 10%, and this boron-containing polyethylene board can effectively absorb neutron radiation and act as a neutron blocker.