Experimental beta-spectra from 239Pu and 235U thermal neutron fission products and their correlated antineutrino spectra

Improved measurements of the neutrino mixing angle θ 13 with the Double Chooz detector

“…The instantaneous thermal power of each reactor core is provided by EDF with time steps of < 1 minute with an uncertainty of 0.5 % at the full reactor power.ν e 's are produced in nuclear reactors by the β-decay of fission products, in which more than 99.7 % of fissions originate from four isotopes, 235 U, 239 Pu, 238 U, and 241 Pu. The referenceν e spectra are derived for 235 U, 239 Pu and 241 Pu from fits to their β spectrum measured at the ILL research reactor [14][15][16] considering the allowed transitions. It was highlighted that contribution of the forbidden - Table 1.…”

Sensitivity toZ-prime and nonstandard neutrino interactions from ultralow threshold neutrino-nucleus coherent scattering

“…A classic series of reactor experiments and analyses [16,18,20,21] performed during the 1980's are the standing primary references for numbers on the normalization and detailed spectral distribution of neutrino daughter products; a more recent reinterpretation of the historical data was presented in Ref. [22].…”

Conversion of electron spectrum associated with fission into the antineutrino spectrum

“…The procedure used in Ref. [5] is sensible and practical. The electron spectrum is divided into a number n of slices.…”

“…The electron spectra corresponding to the thermal neutron fission of 235 U, 239 Pu, and 241 Pu were measured in a series of experiments using the β spectrometer BILL at the Institut Laue-Langevin (ILL) high flux reactor in Grenoble [5] in 1982-1989. In the quoted papers, the electron spectra were converted into theν e spectra.…”