Phenomena and Processes

Radioactivity

The spontaneous transformation of a nuclide into one or more different nuclides, accompanied by either the emission of particles from the nucleus, nuclear capture or ejection of orbital electrons, or fission. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The spontaneous transformation of a nuclide into one or more different nuclides, accompanied by either the emission of particles from the nucleus, nuclear capture or ejection of orbital electrons, or fission. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

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Synonyms

7 entry terms
  • Nuclear Decay
  • Radioactive Disintegration
  • Decay, Nuclear
  • Disintegration, Radioactive
  • Disintegrations, Radioactive
  • Radioactive Disintegrations
  • Radioactivities

MeSH Record

Indexing Annotation

IM general only for principle of emission of radiations; NIM as coordinate for degree of radioactivity of specific radioelements or radioisotopes (IM); do not use as routine coordinate for amount of radiation or degree of radioactivity of radioisotope tracers; entry term NUCLEAR DECAY: coordinate NIM with specific radioactive substance (IM) & do not add RADIOMETRY

MeSH Hierarchy

Tree Number

  1. G01w.828w

AMA Style

References

  1. National Library of Medicine. Radioactivity. Medical Subject Headings (MeSH). 2026. Unique ID D011851. http://id.nlm.nih.gov/mesh/2026/D011851
  2. Radioactivity. In: Wikipedia. https://en.wikipedia.org/wiki/Radioactivity
  3. Radioactivity. In: Wikidata. https://www.wikidata.org/wiki/Q11448