Recent developments in HPGe material and detectors for gamma-ray spectroscopy

Sangsingkeow, P.

doi:10.1117/12.366584

“…Germanium crystals can be grown in large volumes at extremely high purity, with single detectors up to 4 kg [57]. High purity guarantees that both electrons and holes can move untrapped through the whole crystal volume, and that the detector volume can be depleted of charge carriers due to impurities by a manageable applied field of ∼500-1000 V/cm.…”

Section: Germaniummentioning

confidence: 99%

Hard X-ray and gamma-ray detectors

Smith

¹

2013

Observing Photons in Space

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The detection of photons above 10 keV through MeV and GeV energies is challenging due to the penetrating nature of the radiation, which can require large detector volumes, resulting in correspondingly high background. In this energy range, most detectors in space are either scintillators or solid-state detectors. The choice of detector technology depends on the energy range of interest, expected levels of signal and background, required energy and spatial resolution, particle environment on orbit, and other factors. This section covers the materials and configurations commonly used from 10 keV to >1 GeV.

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“…Germanium detectors are preeminent for spectroscopy in the range from hundreds of keV to a few MeV. Germanium crystals can be grown in large volumes at extremely high purity, with single detectors up to 4 kg [57]. High purity guarantees that both electrons and holes can move untrapped through the whole crystal volume, and that the detector volume can be depleted of charge carriers due to impurities by a manageable applied field of ∼500-1000 V/cm.…”

Section: Germaniummentioning

confidence: 99%

Hard X-ray and Gamma-Ray Detectors

Smith¹

2010

Preprint

0

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The detection of photons above 10 keV through MeV and GeV energies is challenging due to the penetrating nature of the radiation, which can require large detector volumes, resulting in correspondingly high background. In this energy range, most detectors in space are either scintillators or solid-state detectors. The choice of detector technology depends on the energy range of interest, expected levels of signal and background, required energy and spatial resolution, particle environment on orbit, and other factors. This section covers the materials and configurations commonly used from 10 keV to >1 GeV.

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“…Among these, an accurate, quantitative method for the evaluation of activity concentrations of gamma-emitting radionuclides is High-Purity Germanium Detector (HPGe detector). Since the energy resolution of an HPGe detector is exceptionally high, identification of the radioactive material can also be obtained from the detected energy [13]. In the present study, we used an HPGe detector to attempt to measure the depth distribution of 131 I in the soil.…”

Section: Introductionmentioning

confidence: 99%