What does neutron mean?

Neutron is one of the nucleons that make up the nucleus. Neutron is an indispensable component of the chemical elements that make up the nucleus (note: atoms do not contain neutrons). Although the chemical properties of atoms are determined by the number of protons in the nucleus, without neutrons, it is impossible to form elements other than hydrogen with only one proton because of the repulsive force between positively charged protons (protons are positively charged and neutrons are uncharged). Neutrons consist of two lower quarks and an upper quark. 2021115 It was learned from China University of Science and Technology that Chinese scientists have accurately measured the neutron electromagnetic structure.

Neutrons exist in the state of aggregation in neutron stars (neutron stars are one of the few destinations that may become after supernova explosion due to gravitational collapse at the end of star evolution). ). Neutrons in the solar system mainly exist in various nuclei, and the β decay of elements is the change of elements in which neutrons in elements release an electron and become the previous element sequence.

Neutrons can be classified according to their speed. High-energy (high-speed) neutrons have ionization ability and can go deep into matter. Neutron is the only substance that can make other substances produce radioactive ionizing radiation. This process is called neutron excitation. Neutron excitation is widely used in the production of radioactive materials in medical, academic and industrial fields.