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arXiv · 2112.11386

Model-Independent Determination of Isotopic Cross Sections per Fission for Reactor Antineutrinos

Yu-Feng Li·Zhao Xin
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Abstract

Model-independent reactor isotopic cross sections per fission are determined by global fits of the reactor antineutrino data from High-Enriched Uranium (HEU) reactor rates, Low-Enriched Uranium (LEU) reactor rates, and reactor fuel evolution data. Taking account of the implicit quasi-linear relationship between the fission fractions of $^{239}\rm{Pu}$ and $^{241}\rm{Pu}$ in the LEU reactor data, the Inverse-Beta-Decay (IBD) yields and their correlations of the fissionable isotopes $^{235}\rm{U}$, $^{238}\rm{U}$, and Pu's are obtained. The data-driven isotopic IBD yields provide an anomaly-free model for the reactor isotopic cross sections per fission, where better than 1\% accuracy of the expected reactor IBD yields can be achieved for future experiments.

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Yu-Feng Li, Zhao Xin. 2021-12-21. Model-Independent Determination of Isotopic Cross Sections per Fission for Reactor Antineutrinos. https://doi.org/10.1103/physrevd.105.073003

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