Speaker
Description
This report shows how the current models of reactor antineutrino energy spectra affect the estimates of the count rate for coherent elastic neutrino-nucleus scattering (CE$\nu$NS) in the RED-100 experiment. The reactor antineutrino spectrum consists of contribution from 4 main (parent) isotopes $^{235}U$, $^{238}U$, $^{239}Pu$, $^{241}Pu$, taken with partial coefficients on the burn-up moment. We analyze and compare the spectra-averaged differential cross-section for each model and compared the resulting CE$\nu$NS count rate in RED-100 at a distance of $\sim$19 meters from reactor core at the Kalinin nuclear power plant (KNPP). The calculations performed show the difference between count rate estimations for each model and the corresponding constraints on CE$\nu$NS cross-section amplitude. It is shown that the reactor high energy antineutrinos make a significant contribution to the prediction value.
