Improving Low-Energy GEANT4 Simulations of $^7$Be EC Decay in STJ Detectors for the BeEST Experiment
ORAL
Abstract
The BeEST Experiment uses Superconducting Tunnel Junctions (STJs) to search for keV-scale sterile neutrinos in the Electron Capture (EC) decay of 7Be. The ultimate sensitivity of this approach is heavily dependent on a precision characterization of the detector response to a wide range of low-energy radiation emitted in the decay. Detailed ultra-low-energy, multi-process particle simulations in GEANT4 are employed to help describe these processes to high accuracy. In this talk, I will present preliminary results and advancements towards accurate meV-scale GEANT4 simulations.
*This work is supported by the US DOE, LLNL, TRIUMF, MetroMMC and the EMPIR Project, and the APS Gordon and Betty Moore Foundation
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