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A transition of an unstable nuclear or particle state to lower-energy products with a characteristic probability per unit time.
wp-physics-radioactive_decayiaea-ensdfpdg-2026-contentsEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Unstable nuclei transform through radioactive decay channels permitted by interactions and energetics.
A physical process transforms the source into, or produces, the target under the conditions stated in the edge detail.
wp-physics-radioactive_decayiaea-ensdfwp-physics-atomic_nucleusnlab-physics-atomic_nucleusThis is an authored directed relation from the source endpoint to the target endpoint.
A radionuclide is characterized in part by its decay modes, half-life, nuclear state, and daughter products.
The target represents a state, property, observable, or state-dependent description associated with the source system or theory.
wp-chem-radiochemistryiaea-neutron-activation-analysisiupac-gold-bookEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Alpha decay is a radioactive decay channel.
The target is a member or subtype of the broader source class.
wp-physics-alpha_decayiaea-ensdfwp-physics-radioactive_decayThis is an authored directed relation from the source endpoint to the target endpoint.
Beta decay is a radioactive decay channel.
The target is a member or subtype of the broader source class.
wp-physics-beta_decayiaea-ensdfwp-physics-radioactive_decayThis is an authored directed relation from the source endpoint to the target endpoint.
Gamma decay is an electromagnetic de-excitation channel.
The target is a member or subtype of the broader source class.
wp-physics-gamma_decayiaea-ensdfwp-physics-radioactive_decayThis is an authored directed relation from the source endpoint to the target endpoint.
A radioactive decay chain is composed of successive radioactive transformations between designated parent and daughter nuclides; branching and very long-lived intermediates must be included when they affect the stated chain model.
The source is a material constituent, structural component, or underlying quantum field whose excitation realizes the target physical system or particle. The edge label and detail must distinguish composition from field excitation; neither implies a simple classical sum of parts.
wp-physics-radioactive_decayiaea-livechartiupac-nuclideThis is an authored directed relation from the source endpoint to the target endpoint.
Radiometric dating uses a decay law together with parent–daughter measurements, closure and initial-condition models, calibration, and propagated uncertainty.
The target is a model, idealization, restricted ansatz, approximation scheme, phenomenological fit, or historical representation used for the source system or theory. It need not have a universal small error parameter and is not thereby a controlled limit or effective theory. The edge label and detail must identify the precise status.
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