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Phys Rev Lett. 2011 Nov 11;107(20):201801. Epub 2011 Nov 7.

Proposed search for a fourth neutrino with a PBq antineutrino source.

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Commissariat à l'Energie Atomique et aux Energies Alternatives, Centre de Saclay, IRFU, Gif-sur-Yvette, France.


Several observed anomalies in neutrino oscillation data can be explained by a hypothetical fourth neutrino separated from the three standard neutrinos by a squared mass difference of a few eV(2). We show that this hypothesis can be tested with a PBq (ten kilocurie scale) (144)Ce or (106)Ru antineutrino beta source deployed at the center of a large low background liquid scintillator detector. In particular, the compact size of such a source could yield an energy-dependent oscillating pattern in event spatial distribution that would unambiguously determine neutrino mass differences and mixing angles.

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