Beta Radiations

《英文msh詞典》Beta Radiations
[入口詞] Beta Radiations
[主題詞] Beta Rays
[英文釋義] 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.