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- Double_electron_capture abstract "Double electron capture is a decay mode of atomic nucleus. For a nuclide (A, Z) with number of nucleons A and atomic number Z, double electron capture is only possible if the mass of the nuclide of (A, Z−2) is lower. In this mode of decay, two of the orbital electrons are captured by two protons in the nucleus, forming two neutrons. Two neutrinos are emitted in the process. Since the protons are changed to neutrons, the number of neutrons increases by 2, the number of protons Z decreases by 2, and the atomic mass number A remains unchanged. By changing the number of protons, double electron capture transforms the nuclide into a new element.Example:In most cases this decay mode is masked by more probable modes (single electron capture etc.), but when all these modes are forbidden or strongly suppressed, double electron capture becomes the main mode of decay. There exist 35 naturally occurring isotopes that can undergo double electron capture. There is, however, only one confirmed observation of this process (for barium-130). One reason is that the probability of double electron capture is enormously small (the theoretical predictions of half-lives for this mode lies well above 1020 years). A second reason is that the only detectable particles created in this process are X-rays and Auger electrons that are emitted by the excited atomic shell. In the range of their energies (~1–10 keV), the background is usually high. Thus, the experimental detection of double electron capture is more difficult than that for double beta decay.If the mass difference between the mother and daughter atoms is more than two masses of electron (1.022 MeV), the energy released in the process is enough to allow another mode of decay: electron capture with positron emission. It occurs simultaneously with double electron capture, their branching ratio depending on nuclear properties. When the mass difference is more than four electron masses (2.044 MeV), the third mode—double positron decay—is allowed. Only 6 naturally occurring nuclides can decay via these three modes simultaneously.".
- Double_electron_capture wikiPageID "2158646".
- Double_electron_capture wikiPageRevisionID "564551709".
- Double_electron_capture hasPhotoCollection Double_electron_capture.
- Double_electron_capture subject Category:Hypothetical_processes.
- Double_electron_capture subject Category:Nuclear_physics.
- Double_electron_capture subject Category:Radioactivity.
- Double_electron_capture type Abstraction100002137.
- Double_electron_capture type Act100030358.
- Double_electron_capture type Activity100407535.
- Double_electron_capture type Event100029378.
- Double_electron_capture type HypotheticalProcesses.
- Double_electron_capture type Procedure101023820.
- Double_electron_capture type PsychologicalFeature100023100.
- Double_electron_capture type YagoPermanentlyLocatedEntity.
- Double_electron_capture comment "Double electron capture is a decay mode of atomic nucleus. For a nuclide (A, Z) with number of nucleons A and atomic number Z, double electron capture is only possible if the mass of the nuclide of (A, Z−2) is lower. In this mode of decay, two of the orbital electrons are captured by two protons in the nucleus, forming two neutrons. Two neutrinos are emitted in the process.".
- Double_electron_capture label "Doppelter Elektroneneinfang".
- Double_electron_capture label "Doppia cattura elettronica".
- Double_electron_capture label "Double capture électronique".
- Double_electron_capture label "Double electron capture".
- Double_electron_capture label "Podwójny wychwyt elektronu".
- Double_electron_capture label "Двойной электронный захват".
- Double_electron_capture label "二重電子捕獲".
- Double_electron_capture sameAs Doppelter_Elektroneneinfang.
- Double_electron_capture sameAs Double_capture_électronique.
- Double_electron_capture sameAs Doppia_cattura_elettronica.
- Double_electron_capture sameAs 二重電子捕獲.
- Double_electron_capture sameAs 이중_전자_포획.
- Double_electron_capture sameAs Podwójny_wychwyt_elektronu.
- Double_electron_capture sameAs m.06r4tq.
- Double_electron_capture sameAs Q520827.
- Double_electron_capture sameAs Q520827.
- Double_electron_capture sameAs Double_electron_capture.
- Double_electron_capture wasDerivedFrom Double_electron_capture?oldid=564551709.
- Double_electron_capture isPrimaryTopicOf Double_electron_capture.