Joint Determination of Reactor Antineutrino Spectra from 235U and 239Pu Fission using the Daya Bay and PROSPECT Experiments
Hans Pieter Mumm, Denis E. Bergeron, Mark Tyra, Svetlana Nour, Jerome LaRosa, The PROSPECT Collaboration
A joint determination of the reactor antineutrino spectra resulting from the fission of 235U and 239Pu has been carried out by the Daya Bay and PROSPECT collaborations. This letter defines the level of compatibility of 235U spectrum measurements from the two experiments and presents new results from a joint analysis of both data sets. The measurements from both experiments are found to be consistent within uncertainty. The combined analysis improves the precision in direct knowledge of the 235U spectral shape to about 3% and reduces the degeneracy between the dominant 235U and 239Pu isotopes. The antineutrino energy spectrum from 235U fission is jointly unfolded from these two experiments using the Wiener-SVD unfolding method, providing a data-based reference for other reactor antineutrino experiments and theoretical models.
, Bergeron, D.
, Tyra, M.
, Nour, S.
, LaRosa, J.
and Collaboration, T.
Joint Determination of Reactor Antineutrino Spectra from 235U and 239Pu Fission using the Daya Bay and PROSPECT Experiments, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.128.081801, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932276
(Accessed December 2, 2023)