Neutrino Flux from Beta-Decaying Isotopes at the SNS

The COHERENT collaboration measures neutrinos from the Spallation Neutron Source (SNS) at the Oak Ridge National Laboratory. SNS operations create radioactive nuclei whose beta decays contribute to this neutrino flux. With beta decays producing a flavor of neutrinos different from those from decaying pions, the neutrinos from each source are distinguishable within simulated SNS operation. In this work, isotope production data collected from SNS operation have been used to determine the nuclei most responsible for relevant radioactive decay events. We report progress on implementing these candidates into a Geant4 simulation of neutrino production from SNS pion decays, modified to support radioactive decay physics, in order to determine a higher precision measure of the total neutrino flux.