| 释义 |
beta emitter
beta emitter[′bād·ə i′mid·ər] (nuclear physics) A radionuclide that disintegrates by emission of a negative or positive electron. beta emitter
beta emitter A radioisotope which decays by emitting an electron particle. Beta emitters are labelled as “soft” emitters if the electron is of low energy and has a short penetration distance, or “hard” if it is high-energy and with a great penetrating distance. |