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• Electron_capture abstract "Electron capture is a process in which a proton-rich nuclide absorbs an inner atomic electron, thereby changing a nuclear proton to a neutron and simultaneously causing the emission of an electron neutrino. Various photon emissions follow, as the energy of the atom falls to the ground state of the new nuclide.Electron capture is the primary decay mode for isotopes with a relative superabundance of protons in the nucleus, but with insufficient energy difference between the isotope and its prospective daughter (the isobar with one less positive charge) for the nuclide to decay by emitting a positron. Electron capture is an alternate decay mode for radioactive isotopes with sufficient energy to decay by positron emission. It is sometimes called inverse beta decay, though this term can also refer to the interaction of an electron antineutrino with a proton.If the energy difference between the parent atom and the daughter atom is less than 1.022 MeV, positron emission is forbidden as not enough decay energy is available to allow it, and thus electron capture is the sole decay mode. For example, rubidium-83 (37 protons, 46 neutrons) will decay to krypton-83 (36 protons, 47 neutrons) solely by electron capture (the energy difference, or decay energy, is about 0.9 MeV).A free proton cannot normally be changed to a free neutron by this process; the proton and neutron must be part of a larger nucleus. In the process of electron capture, one of the orbital electrons, usually from the K or L electron shell (K-electron capture, also K-capture, or L-electron capture, L-capture), is captured by a proton in the nucleus, forming a neutron and emitting an electron neutrino.Since a proton is changed to a neutron during electron capture, the number of neutrons in the nucleus increases by 1, the number of protons decreases by 1, and the atomic mass number remains unchanged. By changing the number of protons, electron capture transforms the nuclide into a new element. The atom, although still neutral in charge, now exists in an excited state with the inner shell missing an electron. An outer shell electron will eventually transition to fill the missing inner electron thereby dropping to a lower ground state. During this process, that electron will emit an X-ray photon (a type of electromagnetic radiation) and other electrons may also emit Auger electrons. Often the nucleus exists in an excited state as well, and emits a gamma ray as it transitions to the ground state energy of the new nuclide.".
• Electron_capture thumbnail Elektroneneinfang_(2_Phasen).png?width=300.
• Electron_capture wikiPageExternalLink livechart.
• Electron_capture wikiPageID "82381".
• Electron_capture wikiPageRevisionID "594198260".
• Electron_capture hasPhotoCollection Electron_capture.
• Electron_capture subject Category:Nuclear_chemistry.
• Electron_capture subject Category:Nuclear_physics.
• Electron_capture subject Category:Radioactivity.
• Electron_capture comment "Electron capture is a process in which a proton-rich nuclide absorbs an inner atomic electron, thereby changing a nuclear proton to a neutron and simultaneously causing the emission of an electron neutrino.".
• Electron_capture label "Captura electrónica".
• Electron_capture label "Captura eletrônica".
• Electron_capture label "Capture électronique".
• Electron_capture label "Cattura elettronica".
• Electron_capture label "Electron capture".
• Electron_capture label "Elektroneneinfang".
• Electron_capture label "Elektronenvangst".
• Electron_capture label "Wychwyt elektronu".
• Electron_capture label "Электронный захват".
• Electron_capture label "اصطياد إلكترون".
• Electron_capture label "电子俘获".
• Electron_capture label "電子捕獲".
• Electron_capture sameAs Elektroneneinfang.
• Electron_capture sameAs Captura_electrónica.
• Electron_capture sameAs Elektroi-harrapaketa.
• Electron_capture sameAs Capture_électronique.
• Electron_capture sameAs Cattura_elettronica.
• Electron_capture sameAs 電子捕獲.
• Electron_capture sameAs 전자_포획.
• Electron_capture sameAs Elektronenvangst.
• Electron_capture sameAs Wychwyt_elektronu.
• Electron_capture sameAs Captura_eletrônica.
• Electron_capture sameAs m.0l4rm.
• Electron_capture sameAs Q109910.
• Electron_capture sameAs Q109910.
• Electron_capture wasDerivedFrom Electron_capture?oldid=594198260.
• Electron_capture depiction Elektroneneinfang_(2_Phasen).png.
• Electron_capture isPrimaryTopicOf Electron_capture.