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Definition of “beta decay” - English Dictionary

"beta decay" in British English

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beta decaynoun [U]

uk   /ˈbiː.tə dɪˌkeɪ/  us   /ˈbeɪ.t̬ə dɪˌkeɪ/ specialized
the process in which a neutron breaks up into a proton and an electron
(Definition of beta decay from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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