beta particle
noun /ˈbiːtə pɑːtɪkl/
/ˈbeɪtə pɑːrtɪkl/
(also beta ray
(physics) /ˈbiːtə reɪ/
/ˈbeɪtə reɪ/
)- a fast-moving electron that is produced when some radioactive substances decay (= start to break down)
- the properties of beta particles
- beta particle emission