Speaker
Description
The SuperNEMO Demonstrator is a double-beta-decay experiment with a unique capability to reconstruct the full topology of decay events. The ability to identify and measure the energy and trajectory of individual particles enables sophisticated background rejection, as well as the ability to search for not only neutrinoless double-beta decay, but also exotic decays and nuclear effects on the standard model double-beta decay.
Ultra-low backgrounds are key when studying rare processes like double-beta decay. In particular, β-emitting contaminants in detector materials - especially the ββ-decay source - can, through secondary interactions, mimic ββ events. This is particularly problematic when studying low-energy effects on the standard-model 2νββ spectrum, where 210Bi, 234mPa, and 40K contribute to the background.
To constrain this effect, we study the 1-electron channel, to fit and quantify the level of background from these isotopes.