Antineutrino
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| Antineutrino | |
| Composition: | Elementary particle |
|---|---|
| Family: | Fermion |
| Group: | Lepton, Anti-Lepton |
| Interaction: | weak force and gravity |
| Antiparticle: | Neutrino |
| Theorized: | 1930 |
| Discovered: | 1956 |
| Symbol: | Template:SubatomicParticle,Template:SubatomicParticle, Template:SubatomicParticle |
| No. of types: | 3 - electron, muon and tau |
| Electric charge: | 0 |
| Color charge: | 0 |
| Spin: | 1/2 |
In physics, antineutrinos, the antiparticles of neutrinos, are neutral particles produced in nuclear beta decay. These are emitted in beta particle emissions, where a neutron turns into a proton. They have a spin of 1/2, and they are part of the lepton family of particles. The antineutrinos observed so far all have right-handed helicity (i.e., only one of the two possible spin states has ever been seen), while the neutrinos are left-handed. Antineutrinos interact with other matter only through the gravitational and weak forces, making them very difficult to detect experimentally. Neutrino oscillation experiments indicate that antineutrinos have mass, but beta decay experiments constrain that mass to be very small.
Because antineutrinos and neutrinos are neutral particles it is possible that they are actually the same particle. Particles which have this property are known as Majorana particles. If neutrinos are indeed Majorana particles then the neutrinoless double beta decay process is allowed. Several experiments have been proposed to search for this process.
Researchers around the world have begun to investigate the possibility of using antineutrinos for reactor monitoring in the context of nonproliferation. [1][2][3]
See also
References
- ↑ LLNL/SNL Applied Antineutrino Physics Project. LLNL-WEB-204112 (2006): http://neutrinos.llnl.gov/
- ↑ Applied Antineutrino Physics 2007 workshop: http://www.apc.univ-paris7.fr/AAP2007/
- ↑ DOE/Lawrence Livermore National Laboratory (2008, March 13). New Tool To Monitor Nuclear Reactors Developed. ScienceDaily. Retrieved March 16, 2008, from http://www.sciencedaily.com/releases/2008/03/080313091522.htm
External links
ca:Antineutríeu:Antineutrino ko:반중성미자 it:Antineutrino he:אנטי-נייטרינו lt:Antineutrinas sr:Антинеутрино sv:Antineutrino
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
