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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Electron emission | 1/1 | https://en.wikipedia.org/wiki/Electron_emission | reference | science, encyclopedia | 2026-05-05T10:55:07.536321+00:00 | kb-cron |
In physics, electron emission is the ejection of an electron from the surface of matter, or, in beta decay (β− decay), where a beta particle (a fast energetic electron or positron) is emitted from an atomic nucleus transforming the original nuclide to an isobar.
== Radioactive decay ==
In Beta decay (β− decay), radioactive decay results in a beta particle (fast energetic electron or positron in β+ decay) being emitted from the nucleus
== Surface emission ==
Thermionic emission, the liberation of electrons from an electrode by virtue of its temperature Schottky emission, due to the: Schottky effect or field enhanced thermionic emission Field electron emission, emission of electrons induced by an electrostatic field
=== Devices ===
An electron gun or electron emitter, is an electrical component in some vacuum tubes that uses surface emission
== Others == Exoelectron emission, a weak electron emission, appearing only from pretreated objects Photoelectric effect, the emission of electrons when electromagnetic radiation, such as light, hits a material
== See also == Positron emission, (of a positron or "antielectron") is one aspect of β+ decay Electron excitation, the transfer of an electron to a higher atomic orbital
== References ==