New TeO2/NbSi detectors for rare event search
Résumé
The present limitation for experiments looking for rare events, such as neutrinoless double beta decay (0 nu beta beta) 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 0 nu beta beta 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.