Details

Autor(en) / Beteiligte

• Almazán, H
• Bernard, L
• Blanchet, A
• Bonhomme, A
• Buck, C
• Sanchez, P Del Amo
• Atmani, I El
• Haser, J
• Labit, L
• Lamblin, J
• Letourneau, A
• Lhuillier, D
• Licciardi, M
• Lindner, M
• Materna, T
• Minotti, A
• Onillon, A
• Pessard, H
• Réal, J-S
• Roca, C
• Rogly, R
• Salagnac, T
• Savu, V
• Schoppmann, S
• Sergeyeva, V
• Soldner, T
• Stutz, A
• Vialat, M

Titel

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

Ist Teil von

• Physical review letters, 2020-11, Vol.125 (20), p.201801-201801

Ort / Verlag

American Physical Society

Erscheinungsjahr

2020

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• 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.