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.
*This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, the Particle Astrophysics and Nuclear Physics Programs of the National Science Foundation, and the Sanford Underground Research Facility.
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Presenters
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Ian Guinn
- Univ of Washington