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- Positron_emission abstract "Positron emission or beta plus decay (β+ decay) is a particular type of radioactive decay and a subtype of beta decay, in which a proton inside a radionuclide nucleus is converted into a neutron while releasing a positron and an electron neutrino (νe). Positron emission is mediated by the weak force. The positron is a type of beta particle (β+), the other beta particle being the electron (β-) emitted from the β- decay of a nucleus.An example of positron emission (β+ decay) is shown with magnesium-23 decaying into sodium-23:2312Mg → 2311Na + e+ + νeBecause positron emission decreases proton number relative to neutron number, positron decay happens typically in large "proton-rich" radionuclides. Positron decay results in nuclear transmutation, changing an atom of a chemical element into an atom of an element with an atomic number that is less by one unit.Positron emission should not be confused with electron emission or beta minus decay (β- decay), which occurs when a neutron turns into a proton and the nucleus emits an electron and an antineutrino. Electron capture (sometimes called inverse beta decay) is also occasionally classified as a type of beta decay. (In some ways, electron capture can be regarded as the "opposite" of positron emission. It can only occur when electrons are available and requires less energy difference between parent and daughter, so occurs much more often in smaller atoms than positron emission does.)".
- Positron_emission wikiPageExternalLink livechart.
- Positron_emission wikiPageID "391267".
- Positron_emission wikiPageRevisionID "597640966".
- Positron_emission hasPhotoCollection Positron_emission.
- Positron_emission subject Category:Nuclear_physics.
- Positron_emission subject Category:Radiation.
- Positron_emission subject Category:Radioactivity.
- Positron_emission comment "Positron emission or beta plus decay (β+ decay) is a particular type of radioactive decay and a subtype of beta decay, in which a proton inside a radionuclide nucleus is converted into a neutron while releasing a positron and an electron neutrino (νe). Positron emission is mediated by the weak force.".
- Positron_emission label "Positron emission".
- Positron_emission label "Rozpad beta plus".
- Positron_emission label "Émission de positron".
- Positron_emission label "Позитронный распад".
- Positron_emission label "إصدار بوزيتروني".
- Positron_emission label "正电子发射".
- Positron_emission label "陽電子放出".
- Positron_emission sameAs Émission_de_positron.
- Positron_emission sameAs 陽電子放出.
- Positron_emission sameAs 양전자_방출.
- Positron_emission sameAs Rozpad_beta_plus.
- Positron_emission sameAs m.022r2l.
- Positron_emission sameAs Q1357356.
- Positron_emission sameAs Q1357356.
- Positron_emission wasDerivedFrom Positron_emission?oldid=597640966.
- Positron_emission isPrimaryTopicOf Positron_emission.