Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 68: Neutrino physics without accelerators III

T 68.7: Vortrag

Mittwoch, 17. März 2021, 17:35–17:50, Tr

Investigating the background of Ge neutrino experiments by ⁷⁶Ge(n,p)⁷⁶Ga reaction studies — •Hans Hoffmann¹, Marie Pichotta¹, Konrad Schmidt², Steffen Turkat¹, Birgit Zatschler¹, and Kai Zuber¹ — ¹TU Dresden IKTP, Dresden, Deutschland — ²HZDR, Dresden, Deutschland

Several neutrino experiments, e.g. GERDA, are searching for the neutrinoless double beta decay of ⁷⁶Ge. The discovery of this extremely rare process with an expected Q-value of 2039 keV would prove the Majorana character of neutrinos and consequently physics beyond Standard Model. For an explicit identification of a signal caused by the neutrinoless double beta decay a precise understanding of the background components is crucial.

Previous work indicates gamma rays from the decay of ⁷⁶Ga in the region of interest (ROI) which can be produced by neutrons via (n,p)-reactions with ⁷⁶Ge and therefore contribute to the background in the ROI. For the investigation of this potential background an enriched Ge-sample is activated by neutrons from a DT generator located at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR). Experimental procedure and preliminary works will be presented. This project is supported by BMBF (05A17OD1).