München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 100: Niederenergie-Neutrinophysik & Suche nach dunkler Materie 1

T 100.7: Talk

Monday, March 9, 2009, 18:35–18:50, A140

Pulse shape analysis with a broad-energy germanium detector for the gerda experiment — •Dušan Budjáš¹, Marik Barnabé Heider¹, Oleg Chkvorets¹, Stefan Schönert¹, and Nikita Khanbekov^1,2 — ¹Max-Planck-Institut für Kernphysik, Heidelberg, Germany — ²Institute for Theoretical and Experimental Physics, Moscow, Russia

To reduce background in experiments looking for rare events, such as the GERDA double beta decay experiment, it is necessary to employ active background-suppression techniques. One of such techniques is the pulse shape analysis of signals induced by the interaction of radiation with the detector. Analysis of the time-development of the impulses can distinguish between an interaction of an electron and an interaction of a multiple-scattered photon inside the detector. This information can be used to eliminate unwanted events from the recorded data.

In this talk, results of a pulse-shape analysis of signals from a commercially available broad-energy germanium detector will be presented. The background rejection capability of such detector configuration and the potential for its use in ultralow-background experiments will be discussed.