The Search for Double-Beta Decay to Excited States in $^{76}$Ge using the \textsc{Majorana Demonstrator}
ORAL
Abstract
The Majorana Demonstrator is studying double-beta decay in $^{76}$Ge using a modular array of high purity Germanium detectors. The experiment is constructed using low-background materials and is currently operating at the '4850 level of the Sanford Underground Research Facility. The experiment consists of two modules with 29~detectors each, consisting of 44.8~kg of germanium detectors, 29.7~kg of which are enriched to 88\% in $^{76}$Ge. The granularity of the detector array and the p-type point contact detector geometry enable discrimination of single- and multi-site events. The \textsc{Demonstrator} is also searching for double-beta decay of $^{76}$Ge to three different excited states (E.S.s) of $^{76}$Se. The E.S. decays are inherently multi-site events with one or two $\gamma$-rays produced nearly simultaneously to the $\beta\beta$-decay. This talk will present the \textsc{Majorana Demonstrator}'s search for $\beta\beta$-decay to excited states in multi-site events.
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Presenters
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Ian Guinn
Univ of Washington
Authors
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Ian Guinn
Univ of Washington