Determination of the antineutrino spectrum from 235U thermal neutron fission products up to 9.5 MeV

Abstract

A measurement of the cumulated beta spectrum from 235U fission products was performed with a magnetic spectrometer. The energy range 2.0-9.5 MeV was covered achieving a sensitivity of 3 x 10-6 betas per MeV per fission in the high energy region. The absolute rates were calibrated with a precision of 3%. The beta spectrum was converted into the correlated νe spectrum to provide a basis for antineutrino experiments at nuclear reactors. © 1985.