How to Catch a Rare Decay: A Scanner for Germanium Detectors
Hunting for the rarest decay is like searching for a single counterfeit coin in a pile of real ones. You not only have to find it, but also prove it's not just a glint on the metal. In the LEGEND experiment, they're looking for the neutrinoless double beta decay of germanium-76—an event that would occur if the neutrino is its own antiparticle.