Event Generator for Neutrinos on Deuterons*

COHERENT is a collaboration studying coherent elastic neutrino-nucleus scattering (CEvNS), a process with a well predicted but very small cross section. Several detectors are operated at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory to study CEvNS. Currently there is ~10% uncertainty in neutrino flux at SNS. This uncertainty can be reduced with the addition of a heavy water detector which will measure neutrino flux. Simulations will be done to study the feasibility and efficacy of this detector. The purpose of this project is to create an event generator for these simulations. This involved constructing 2D histograms from tables of double differential cross section calculations for the  reaction. These cross sections have been weighted by the SNS flux, allowing for the random selection of events weighted by both the flux distribution and cross section information. This gives a sample of randomly generated electron events that are a realistic representation of reactions at SNS for input into a Monte Carlo simulation. Additionally, the code written to create these distributions will be made available for application to similar projects.