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

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

doi:10.1103/PhysRevLett.125.201801

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

Almazan, H., Bernard, L., Blanchet, A., Bonhomme, A., Buck, C., del Amo Sanchez, P., et al. (2020). Accurate Measurement of the Electron Antineutrino Yield of ²³⁵U Fissions from the STEREO Experiment with 119 Days of Reactor-On Data. Physical Review Letters, 125(20): 201801. doi:10.1103/PhysRevLett.125.201801.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0008-2811-8 Version Permalink: https://hdl.handle.net/21.11116/0000-0008-2812-7

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Almazan, H.¹, Author
Bernard, L.¹, Author
Blanchet, A.¹, Author
Bonhomme, A.¹, Author
Buck, C.², Author
del Amo Sanchez, P. ¹, Author
El Atmani, I¹, Author
Haser, Julia², Author
Labit, L.¹, Author
Lamblin, J.¹, Author
Letourneau, A.¹, Author
Lhuillier, D.¹, Author
Licciardi, M.¹, Author
Lindner, M.², Author
Materna, T.¹, Author
Minotti, A.¹, Author
Onillon, A.¹, Author
Pessard, H.¹, Author
Real, J-S¹, Author
Roca, C.¹, Author
Rogly, R.¹, AuthorSalagnac, T.¹, AuthorSavu, V¹, AuthorSchoppmann, S.¹, AuthorSergeyeva, V¹, AuthorSoldner, T.¹, AuthorStutz, A.¹, AuthorVialat, M.¹, Author more..

Affiliations:
1external, ou_persistent22
2Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society, ou_904549

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Abstract: We report a measurement of the antineutrino rate from the fission of U-235 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 U-235 fuel. We measure an IBD cross section per fission of sigma(f) = (6.34 +/- 0.06[stat] +/- 0.15[sys] +/- 0.15[model]) x 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, consistent with the deficit of the world average. Testing U-235 as the sole source of the deficit, we find a tension between the results of lowly and highly enriched U-235 fuel of 2.1 standard deviations.

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Dates: Published Online: 2020-11

Publication Status: Published online

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Identifiers: DOI: 10.1103/PhysRevLett.125.201801

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Title: Physical Review Letters

Abbreviation : Phys. Rev. Lett.

Source Genre: Journal

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Publ. Info: Woodbury, N.Y. : American Physical Society

Pages: - Volume / Issue: 125 (20) Sequence Number: 201801 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1