Nuclear structure insights into reactor antineutrino spectra

A. A. Sonzogni, T. D. Johnson, E. A. McCutchan
2015 Physical Review C  
Antineutrino spectra following the neutron induced fission of 235 U, 238 U, 239 Pu, and 241 Pu are calculated using the summation approach. While each system involves the decay of more than 800 fission products, the energy region of the spectra most relevant to neutrino oscillations and the reactor antineutrino anomaly is dominated by less than 20 nuclei, for which we provide a priority list to drive new measurements. The very high energy portion of the spectrum is mainly due to the decay of
more » ... t two nuclides, 92 Rb and 96 Y. The integral of the signal measured by antineutrino experiments is found to have a dependence on the mass and proton number of the fissioning system. In addition, we observe that ∼ 70% of the signal originates from the light fission fragment group and about 50% from the decay of odd-Z odd-N nuclides.
doi:10.1103/physrevc.91.011301 fatcat:zvgdw2n3wzgpvdgczeyq4p4ea4