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HK: Fachverband Physik der Hadronen und Kerne

HK 25: Fundamentale Symmetrien

HK 25.3: Talk

Wednesday, March 21, 2012, 14:45–15:00, P 1

(contribution withdrawn) The Enriched Xenon Observatory (EXO) for double beta decay — •Wolfhart Feldmeier — TU München

The Enriched Xenon Observatory (EXO) is an experimental program designed to search for the neutrinoless double beta decay (0nbb) of Xe-136. Observation of 0nbb would determine an absolute mass scale for neutrinos and answer the question about their hypothetical Majorana nature. The current phase of the experiment, EXO-200, uses 200 kg of liquid xenon with 80% enrichment in Xe-136. The double beta decay of xenon is detected in an ultra-low background time projection chamber by collecting both, the scintillation light and the ionization charge. The detector has provided the first measurement of two neutrino double beta decay and continues to take data for a neutrinoless analysis.