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Decay of an excited atomic state by coupling to vacuum electromagnetic modes, with photon emission when allowed.
wp-physics-spontaneous_emissionnist-atomic-spectroscopytong-qftEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Spontaneous emission lowers an excited state through coupling to the quantized field.
The target is a member or subtype of the broader source class.
wp-physics-spontaneous_emissionnist-atomic-spectroscopywp-physics-atomic_energy_levelThis is an authored directed relation from the source endpoint to the target endpoint.
An excited atomic state with an allowed radiative channel may decay by spontaneous emission; metastability and nonradiative channels depend on selection rules and environment.
A physical process transforms the source into, or produces, the target under the conditions stated in the edge detail.
nist-atomic-spectroscopytong-qftThis is an authored directed relation from the source endpoint to the target endpoint.
Spontaneous emission requires the quantized electromagnetic field; a purely classical field does not produce vacuum spontaneous emission.
The source field, particle, charge, current, or interaction couples to, acts on, binds, forms, or stabilizes the target in the stated regime. The edge label and detail must identify the exact coupling, interaction, or binding claim and its qualifications.
wp-physics-spontaneous_emissionnist-atomic-spectroscopywp-physics-electromagnetic_fieldpdg-standard-modelEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
An ordinary allowed one-photon radiative atomic decay produces a photon together with atomic recoil and finite linewidth; higher-order channels can emit two or more photons.
A physical process transforms the source into, or produces, the target under the conditions stated in the edge detail.
nist-atomic-spectroscopytong-qft