Accurate Measurement of the Electron Antineutrino Yield of ^{235}U Fissions from the STEREO Experiment with 119 Days of Reactor-On Data.

  title={Accurate Measurement of the Electron Antineutrino Yield of ^\{235\}U Fissions from the STEREO Experiment with 119 Days of Reactor-On Data.},
  author={H. Almaz{\'a}n and L. Bernard and A. Blanchet and A. Bonhomme and C. Buck and Pablo del Amo Sanchez and I. El Atmani and Julia Haser and L. Labit and J. Lamblin and A. Letourneau and D. Lhuillier and M. Licciardi and Manfred Lindner and Thomas Materna and Alessandro Minotti and Anthony Onillon and H. Pessard and J.-S. R{\'e}al and Ch. Ferrer Roca and Rudolph Rogly and T. Salagnac and Veronica Savu and Sebastian F. Schoppmann and V. Sergeyeva and T. Soldner and A. Stutz and Marine Vialat},
  journal={Physical review letters},
  volume={125 20},
We report a measurement of the antineutrino rate from the fission of ^{235}U with the STEREO detector using 119 days of reactor turned on. In our analysis, we perform several detailed corrections and achieve the most precise single measurement at reactors with highly enriched ^{235}U fuel. We measure an IBD cross section per fission of σ_{f}=(6.34±0.06[stat]±0.15[sys]±0.15[model])×10^{-43}  cm^{2}/fission and observe a rate deficit of (5.2±0.8[stat]±2.3[sys]±2.3[model])% compared to the model… 

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