Radioactivity

2 topics · 3 sources

Nuclear Physics

The spontaneous decay of disintegration of an unstable atomic nucleus accompanied by the emission of radiation.

Nuclear Science Division, Lawrence Berkeley National Laboratory — Glossary of Nuclear Science Terms retrieved 2014-05-20

Spontaneous emission of radiation, either directly from unstable atomic nuclei or as a consequence of a nuclear reaction. This radiation includes alpha particles, nucleons, electrons, and gamma rays, emitted by a radioactive substance.

National Tritium Labeling Facility (NTLF) at Lawrence Berkeley National Laboratory (LBNL) — Environmental Health Risk Assessment for Tritium Released at the National Tritium Labeling Facility (NTLF) at Lawrence Berkeley National Laboratory (LBNL) retrieved 2014-05-20

Technology

Defense

The spontaneous emission of radiation, generally alpha or beta particles, often accompanied by gamma rays, from the nuclei or an unstable isotope.

DoD Missile Defense Agency — MDA Glossary