An improved limit on the neutrinoless double-electron capture of ${}^{36}$Ar with GERDA

GERDA Collaboration, M. Agostini, A. Alexander +110

The GERmanium Detector Array (GERDA) experiment operated enriched high-purity germanium detectors in a liquid argon cryostat, which contains 0.33% of ${}^{36}$Ar, a candidate isotope…