We report a measurement of the antineutrino rate from the fission of U235 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 U235 fuel. We measure an IBD cross section per fission of σf=(6.34±0.06[stat]±0.15[sys]±0.15[model])×10-43 cm2/fission and observe a rate deficit of (5.2±0.8[stat]±2.3[sys]±2.3[model])% compared to the model, consistent with the deficit of the world average. Testing U235 as the sole source of the deficit, we find a tension between the results of lowly and highly enriched U235 fuel of 2.1 standard deviations.

Almazan, H., Bernard, L., Blanchet, A., Bonhomme, A., Buck, C., Sanchez, P., et al. (2020). Accurate Measurement of the Electron Antineutrino Yield of U 235 Fissions from the STEREO Experiment with 119 Days of Reactor-On Data. PHYSICAL REVIEW LETTERS, 125(20) [10.1103/PhysRevLett.125.201801].

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

Minotti A.;
2020

Abstract

We report a measurement of the antineutrino rate from the fission of U235 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 U235 fuel. We measure an IBD cross section per fission of σf=(6.34±0.06[stat]±0.15[sys]±0.15[model])×10-43 cm2/fission and observe a rate deficit of (5.2±0.8[stat]±2.3[sys]±2.3[model])% compared to the model, consistent with the deficit of the world average. Testing U235 as the sole source of the deficit, we find a tension between the results of lowly and highly enriched U235 fuel of 2.1 standard deviations.
Articolo in rivista - Articolo scientifico
Sterile Neutrinos;
English
2020
125
20
201801
open
Almazan, H., Bernard, L., Blanchet, A., Bonhomme, A., Buck, C., Sanchez, P., et al. (2020). Accurate Measurement of the Electron Antineutrino Yield of U 235 Fissions from the STEREO Experiment with 119 Days of Reactor-On Data. PHYSICAL REVIEW LETTERS, 125(20) [10.1103/PhysRevLett.125.201801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/316679
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