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Germanium cryogenic detectors: Alpha surface events rejection capabilities

Abstract : Alpha surface events and multiple compton gamma interactions are the two major background components in Ge detectors for double-beta decay investigations. Two different methods have been studied to identify such type of events, using cryogenic Ge detectors developed primarily for dark matter search: (i) combined heat and ionization measurements, and (ii) pulse-shape analysis of the charge collection signals. Both methods show strong separation between electron recoil events and surface alphas. Cryogenic heat-ionization detectors therefore appear able to reject virtually all surface alpha interactions.
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Submitted on : Friday, May 12, 2006 - 4:42:36 PM
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S. Fiorucci, A. Broniatowski, G. Chardin, B. Censier, A. de Lesquen, et al.. Germanium cryogenic detectors: Alpha surface events rejection capabilities. 11th International Workshop on Low Temperature Detectors - LTD-11, Jul 2005, Tokyo, Japan. pp.358-360, ⟨10.1016/j.nima.2005.12.134⟩. ⟨in2p3-00068684⟩



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