High Purity Germanium Detectors

A special issue of Particles (ISSN 2571-712X).

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 5676

Special Issue Editors


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Guest Editor
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
Interests: neutrino; dark matter; KATRIN; LEGEND; DEAP-3600

E-Mail Website
Guest Editor
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
Interests: nuclear physics; radiation detection; gamma-ray imaging

Special Issue Information

Dear Colleagues,

Since their invention in the 1970s, high purity germanium (HPGe) detectors have been the gold standard for the detection and spectroscopy of gamma rays. Developments in the fabrication, packaging, and operation of HPGe detectors, as well as in readout electronics and signal processing, have led to their application in fields as diverse as fundamental nuclear and particle physics, nuclear security and safety, and medicine. For example, position-sensitive HPGe detectors have been used to develop portable gamma-ray imaging systems, while extremely large HPGe detectors arrays are under development for the search for neutrinoless double beta decay.

This Special Issue aims to capture the science and technology of HPGe detectors and highlight the breadth and impact of their application in basic and applied science.

We invite contributions that describe all aspects of HPGe detector technology, including but not limited to device design and fabrication, modeling and characterization, signal processing, and applications.

Dr. Bjoern Lehnert
Dr. Reynold Cooper
Guest Editors

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Keywords

  • high-purity germanium
  • semiconductor
  • radiation detection

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Published Papers (1 paper)

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Research

23 pages, 2275 KiB  
Article
Surface Characterization of P-Type Point Contact Germanium Detectors
by Frank Edzards, Lukas Hauertmann, Iris Abt, Chris Gooch, Björn Lehnert, Xiang Liu, Susanne Mertens, David C. Radford, Oliver Schulz and Michael Willers
Particles 2021, 4(4), 489-511; https://doi.org/10.3390/particles4040036 - 20 Oct 2021
Cited by 4 | Viewed by 4085
Abstract
P-type point contact (PPC) germanium detectors are used in rare event and low-background searches, including neutrinoless double beta (0νββ) decay, low-energy nuclear recoils, and coherent elastic neutrino-nucleus scattering. The detectors feature an excellent energy resolution, low detection thresholds down to the sub-keV range, [...] Read more.
P-type point contact (PPC) germanium detectors are used in rare event and low-background searches, including neutrinoless double beta (0νββ) decay, low-energy nuclear recoils, and coherent elastic neutrino-nucleus scattering. The detectors feature an excellent energy resolution, low detection thresholds down to the sub-keV range, and enhanced background rejection capabilities. However, due to their large passivated surface, separating the signal readout contact from the bias voltage electrode, PPC detectors are susceptible to surface effects such as charge build-up. A profound understanding of their response to surface events is essential. In this work, the response of a PPC detector to alpha and beta particles hitting the passivated surface was investigated in a multi-purpose scanning test stand. It is shown that the passivated surface can accumulate charges resulting in a radial-dependent degradation of the observed event energy. In addition, it is demonstrated that the pulse shapes of surface alpha events show characteristic features which can be used to discriminate against these events. Full article
(This article belongs to the Special Issue High Purity Germanium Detectors)
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