Pulse shapes from electron and photon induced events in segmented high-purity germanium detectors

Details Pulse shapes from electron and photon induced events in segmented high-purity germanium detectors Pulse shapes from electron and photon induced events in segmented high-purity germanium detectors

2007-04-23

arxiv.org/abs/0704.3016v1

Eur.Phys.J.C52:19-27,2007

Physics

Nuclear Physics

Nuclear Experiment

18 pages, 7 figures, to be submitted to Nucl. Instrum. Meth. A

Scientific paper

10.1140/epjc/s10052-007-0390-8

Experiments built to search for neutrinoless double beta-decay are limited in their sensitivity not only by the exposure but also by the amount of background encountered. Radioactive isotopes in the surrounding of the detectors which emit gamma-radiation are expected to be a significant source of background in the GERmanium Detector Array, GERDA. Methods to select electron induced events and discriminate against photon induced events inside a germanium detector are presented in this paper. The methods are based on the analysis of the time structure of the detector response. Data were taken with a segmented GERDA prototype detector. It is shown that the analysis of the time response of the detector can be used to distinguish multiply scattered photons from electrons.

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