Radiation,Beta

《英文msh词典》Radiation,Beta
[入口词] Radiation,Beta
[主题词] Beta Rays
[英文释义] A stream of positive or negative electrons ejected with high energy from a disintegrating atomic nucleus; most biomedically used isotopes emit negative particles (electrons or negatrons,rather than positrons). Cathode rays are low-energy negative electrons produced in cathode ray tubes,also called television tubes or oscilloscopes.