Bonn 2020 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 28: Astroparticle Physics I

HK 28.6: Talk

Wednesday, April 1, 2020, 15:30–15:45, J-HS B

Pulse shape analysis in GERDA — •Vikas Bothe for the GERDA collaboration — Max Plank Institute for Nuclear Physics, Heidelberg

The GERDA experiment searches for the neutrinoless double-beta decay of 76Ge using enriched high purity Germanium diodes as a source as well as a detector. For such a rare event search, the sensitivity of the experiment can be improved by employing active background suppression techniques. Pulse shape analysis of the signals generated by the interaction of radiation within a detector is employed to discriminate background events. Analysis of time development of pulse can discriminate between the interaction of electron, an interaction of alpha and interaction of Compton scattered photon inside the detector. In Phase II, GERDA operates 35.6 kg HPGe detectors which include 6 semi-coaxial detectors and 30 BEGe detectors. Different pulse shape analysis techniques are employed for these two types of detectors due to their different geometries. We will discuss the results from the pulse shape analysis of these detectors in GERDA.