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A Compton scattering setup for pulse shape discrimination studies in germanium detectors.

K von Sturm1, S Belogurov2, R Brugnera1

  • 1Dipartimento di Fisica e Astronomia, Università di Padova, IT-35131 Padova, Italy; INFN Sezione di Padova, IT-35131 Padova, Italy.

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Summary

Pulse shape discrimination improves sensitivity in low background experiments. A new setup investigates high-purity germanium detector responses to single Compton scattered events, correlating signal shape with detector properties.

Keywords:
Coincidence measurementsGamma-ray instrumentsHPGe detectorsSignal analysis

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Area of Science:

  • Nuclear physics
  • Detector instrumentation

Background:

  • Pulse shape discrimination (PSD) is crucial for enhancing sensitivity in low-background physics experiments.
  • Understanding detector response variations is key for optimizing performance.

Purpose of the Study:

  • To investigate the position-dependent response of high-purity germanium (HPGe) detectors.
  • To correlate the signal shape of single Compton scattered events with detector geometry and electrical characteristics.

Main Methods:

  • Development of a dedicated experimental setup for controlled measurements.
  • Utilizing collimated gamma-ray sources to select events with known interaction locations.
  • Analysis of signal pulse shapes in relation to event position within the HPGe detector.

Main Results:

  • Successful design and implementation of the experimental setup.
  • Demonstration of the capability to select single Compton scattered events with known interaction points.
  • Initial data analysis showing variations in signal shape based on interaction location.

Conclusions:

  • The developed setup is effective for studying position-dependent detector responses.
  • Correlating signal shape with position is feasible and provides insights into detector physics.
  • Further analysis will refine understanding of HPGe detector characteristics for improved experimental sensitivity.