《英文msh詞典》Ray,Cathode
[入口詞] Ray,Cathode
[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.