2014/11/30 by K. Schäffner, G. Angloher, F. Bellini +13 · 1 citation
Physics and Astronomy · #Alpha particle #Astrophysics #Bolometer #Cherenkov radiation #Dark Matter and Cosmic Phenomena #Detector #Double beta decay #Event (particle physics) #Neutrino #Neutrino Physics Research #Nuclear physics #Optics #Optoelectronics #Particle identification #Particle physics theoretical and experimental studies #Physics #Transition edge sensor #physics.ins-det
paper · pdf · doi:10.1016/j.astropartphys.2015.03.008
published as Astroparticle Physics (2015), pp. 30-36 · 8 pages, 7 figures
arxiv created 2015/03/24 · openalex publication_date 2015/04/05 · arxiv updated 2015/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
An active discrimination of the dominant α-background is the prerequisite for future neutrinoless double-beta decay experiments based on TeO2 bolometers. We investigate such α-particle rejection in cryogenic TeO2 bolometers by the detection of Cherenkov light. For a setup consisting of a massive TeO2 crystal (285 g) and a separate cryogenic light detector, both using transition edge sensors as temperature sensors operated at around 10 mK, we obtain an event-by-event identification of e/γ- and α-events. We find in the energy interval ranging from 2400 keV to 2800 keV and covering the Q-value of the neutrinoless double-beta decay of 130Te a separation of the means of the two populations of 3.7 times their width.