Infobox Particle
bgcolour =
name = Antineutrino

caption =
num_types = 3 - electron, muon and tau
composition = Elementary particle
family = Fermion
group = Lepton, Anti-Lepton
generation =
interaction = weak force and gravity
particle =
antiparticle = Neutrino
theorized = 1930
discovered = 1956
symbol = SubatomicParticle|Electron antineutrino,SubatomicParticle|Muon antineutrino, SubatomicParticle|Tau antineutrino
mass =
decay_time =
decay_particle =
electric_charge = 0
color_charge = 0
spin = 1/2
lepton_number = -1
num_spin_states =

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 one 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. [LLNL/SNL Applied Antineutrino Physics Project. LLNL-WEB-204112 (2006):] [Applied Antineutrino Physics 2007 workshop:] [DOE/Lawrence Livermore National Laboratory (2008, March 13). New Tool To Monitor Nuclear Reactors Developed. ScienceDaily. Retrieved March 16, 2008, from]

ee also

* Neutrino
* Kamioka Liquid Scintillator Antineutrino Detector


External links

* [ Search for neutrinoless double beta decay with enriched 76Ge in Gran Sasso 1990–2003]

Wikimedia Foundation. 2010.

См. также в других словарях:

  • Antineutrino — Saltar a navegación, búsqueda Fermión Símbolo Masa Familia del electrón Neutrino electrónico < 2.5 eV Antineutrino electrónico …   Wikipedia Español

  • antineutrino — ANTINEUTRÍNO s.m. (fiz.) Particulă ipotetică implicată în procesele nucleare. [pr.: ne u ] – Din engl., fr. antineutrino. Trimis de ana zecheru, 25.02.2004. Sursa: DEX 98  antineutríno s. m. (sil. ne u tri ) Trimis de siveco, 10.08.2004. Sursa:… …   Dicționar Român

  • antineutrino — n. The antiparticle of a neutrino. Each type of neutrino has a corresponding antineutrino. [WordNet 1.5] …   The Collaborative International Dictionary of English

  • antineutrino — [ ɑ̃tinøtrino ] n. m. • 1958; de 1. anti et neutrino ♦ Phys. Antiparticule du neutrino. ● antineutrino nom masculin Antiparticule du neutrino. antineutrino [ɑ̃tinøtʀino] n. m. ÉTYM. 1958; …   Encyclopédie Universelle

  • antineutrino — antineutrino. m. Fís. Antipartícula del neutrino. * * * ► masculino FÍSICA NUCLEAR Antipartícula del neutrino …   Enciclopedia Universal

  • antineutrino — antineutríno m DEFINICIJA fiz. elementarna čestica bez naboja, antičestica neutrinu ETIMOLOGIJA anti + v. neutrino …   Hrvatski jezični portal

  • antineutrino — m. Fís. Antipartícula del neutrino …   Diccionario de la lengua española

  • antineutrino — [an΄tī no͞o trē′nō; an΄tēno͞o trē′nō, an΄tino͞o trē′nō] n. the antiparticle of the neutrino, with no charge and a rest mass close to zero: it is emitted during radioactive decay …   English World dictionary

  • Antineutrino — Neutrino Klassifikation Elementarteilchen Fermion Lepton Eigenschaften Ladung neutral Ruheenergie (Elektr. Antineutrino) < 2  …   Deutsch Wikipedia

  • Antineutrino — Neutrino Neutrinos Propriétés générales Classification Leptons Composition élémentaires Propriétés physiques Masse • νe : < 2,5 eV.c 2 • νμ : < 170 keV.c 2 • ντ : < 18 MeV …   Wikipédia en Français

Поделиться ссылкой на выделенное

Прямая ссылка:
Нажмите правой клавишей мыши и выберите «Копировать ссылку»