New TeO2/NbSi Detectors for Rare Event Search

The present limitation for experiments looking for rare events, such as neutrinoless double beta decay (0ν β β) and direct WIMPs detection, is the radioactive background and in particular its discrimination. When the search is based on the bolometric technique, near-surface events constitute a serious problem, due to full volume sensitivity of the detector; in fact for a 0ν β β experiment they may cause signals close to the Q-value while for a dark matter (DM) experiment, which exploits ionization signal for particle identification, they may originate an incomplete charge collection simulating a nuclear recoil.