beta particle
US /ˈbeɪtə ˌpɑːrtɪkl/
UK /ˈbeɪtə ˌpɑːrtɪkl/

1.
β粒子
a fast-moving electron or positron emitted during radioactive decay of an atomic nucleus.
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The radioactive isotope decays by emitting a beta particle.
放射性同位素通过发射β粒子衰变。
β粒子
a fast-moving electron or positron emitted during radioactive decay of an atomic nucleus.