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The Homestake experiment (sometimes referred to as the Davis experiment or Solar Neutrino Experiment and in original literature called Brookhaven Solar Neutrino Experiment or Brookhaven 37 Cl (Chlorine) Experiment) [1] was an experiment headed by astrophysicists Raymond Davis, Jr. and John N. Bahcall in the late 1960s.
A solar neutrino is a neutrino originating from nuclear fusion in the Sun's core, and is the most common type of neutrino passing through any source observed on Earth at any particular moment. [ citation needed ] Neutrinos are elementary particles with extremely small rest mass and a neutral electric charge .
Detailed observations of the neutrino spectrum from more advanced neutrino observatories produced results which no adjustment of the solar model could accommodate: while the overall lower neutrino flux (which the Homestake experiment results found) required a reduction in the solar core temperature, details in the energy spectrum of the ...
Daya Bay Reactor Neutrino Experiment R ν e: ν e + p → e + + n: CC Gd-doped LAB Scintillation: 1.8 MeV Daya Bay, China 2011–2020 Double Chooz: Double Chooz Reactor Neutrino Experiment R ν e: ν e + p → e + + n: CC Gd-doped LOS: Scintillation: 1.8 MeV Chooz, France 2011–2017 DUNE: Deep Underground Neutrino Experiment AC, ATM, (S), SN ...
Solar neutrino experiments combined with KamLAND have measured the so-called solar parameters Δm 2 sol and sin 2 θ sol. Atmospheric neutrino experiments such as Super-Kamiokande together with the K2K and MINOS long baseline accelerator neutrino experiment have determined the so-called atmospheric parameters Δm 2 atm and sin 2 θ atm.
Raymond Davis Jr. (October 14, 1914 – May 31, 2006) was an American chemist and physicist.He is best known as the leader of the Homestake experiment in the 1960s-1980s, which was the first experiment to detect neutrinos emitted from the Sun; for this he shared the 2002 Nobel Prize in Physics.
The neutrino is absorbed in the reaction and an electron is produced. Solar neutrinos have energies smaller than the mass of muons and tau leptons, so only electron neutrinos can participate in this reaction. The emitted electron carries off most of the neutrino's energy, on the order of 5–15 MeV, and is detectable. The proton which is ...
This was dramatically confirmed in the Sudbury Neutrino Observatory (SNO), which has resolved the solar neutrino problem. SNO measured the flux of solar electron neutrinos to be ~34% of the total neutrino flux (the electron neutrino flux measured via the charged current reaction, and the total flux via the neutral current reaction). The SNO ...