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antineutrino |
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antineutrino [′an·tē·nü¦trē·nō] (particle physics) The antiparticle to the neutrino; it has zero mass, spin ½, and positive helicity; there are two antineutrinos, one associated with electrons and one with muons. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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He, Suzuki, and other scientists proposed years ago that KamLAND could detect Earth-derived antineutrinos even though the detector was designed to observe properties of more energetic antineutrinos from nuclear-power reactors (SN: 12/14/02,19. For nearly half a century, physicists have scanned nuclear reactors' radiation for evidence that the wispy fundamental particles of antimatter known as antineutrinos undergo bizarre identity transformations. The standard model predicts a type of double-beta decay in which two neutrons simultaneously decay, while two electrons and two antineutrinos are emitted. |
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