Pulse-shape discrimination of surface events in CdZnTe detectors for the COBRA experiment

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Autor/in:
Erscheinungsjahr:
2014
Medientyp:
Text
Schlagworte:
  • CZT
  • Semiconductor detector
  • Coplanar grid
  • Pulse shape
  • Lateral surface event
  • Double beta decay
Beschreibung:
  • Events near the cathode and anode surfaces of a coplanar grid CdZnTe detector are identifiable by means of the interaction depth information encoded in the signal amplitudes. However, the amplitudes cannot be used to identify events near the lateral surfaces. In this paper a method is described to identify lateral surface events by means of their pulse shapes. Such identification allows for discrimination of surface alpha particle interactions from more penetrating forms of radiation, which is particularly important for rare event searches. The effectiveness of the presented technique in suppressing backgrounds due to alpha contamination in the search for neutrinoless double beta decay with the COBRA experiment is demonstrated. © 2014 Elsevier B.V.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/efa02105-2a3e-4571-a13b-03ba501e63e4