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The XXX International Conference on Neutrino Physics and Astrophysics (Neutrino 2022)

30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

Joint Spectral Determination of Reactor Antineutrinos from U235 and Pu239 Fission by the Daya Bay and PROSPECT Experiments

Not scheduled
5m
Virtual Seoul

Virtual Seoul

Poster Reactor neutrinos

Speaker

Jinhao Huang (Institute of High Energy Physics)

Description

This poster presents a joint determination of the spectra of the reactor antineutrinos resulting from fissions of $^{235}U$ and $^{239}Pu$ by the Daya Bay and PROSPECT experiments. In the Daya Bay experiment, the antineutrinos were generated by six low-enriched uranium (LEU) commercial reactors with 2.9 GW thermal power each and detected by eight antineutrino detectors deployed in two near and one far underground experimental halls . In the PROSPECT experiment, the antineutrinos were generated by an 85 MW thermal power high-enriched uranium (HEU) research reactor and detected by a 4-ton $^{6}Li$-loaded liquid scintillator (LiLS) detector. This is the first combined measurement from experiments based on LEU and HEU reactors. With a joint analysis of both experiments' data, the precision of the derived $^{235}U$ spectrum is improved beyond that individually observed by either experiment, and the degeneracy between derived $^{235}U$ and $^{239}Pu$ spectra is reduced below that from Daya Bay alone. In addition, the antineutrino energy spectrum of $^{235}U$ is unfolded with the Wiener-SVD method, providing a more precise data-based prediction for the other reactor antineutrino experiments.

Collaboration Daya Bay Collaboration

Primary author

Jinhao Huang (Institute of High Energy Physics)