elementary particle
in nuclear chemistry
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https://doi.org/10.1351/goldbook.E02034
A particle in which, at the present, no structure can be observed at moderate energies.
Source:
PAC, 1982,
54
, 1533. 'Glossary of terms used in nuclear analytical chemistry (Provisional)' on page 1547 (https://doi.org/10.1351/pac198254081533)