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Background reduction at DTU Nutech surface gamma laboratory.

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Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
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Background sources in a germanium detector were identified and reduced. A cosmic veto system and optimized data acquisition minimized background radiation, improving detector performance in surface laboratories.

Keywords:
AnticoincidenceCosmic vetoGamma spectrometryHPGe detectorLow-level

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Area of Science:

  • Nuclear instrumentation
  • Radiation detection physics

Background:

  • Background radiation in germanium detectors
  • Surface laboratory environmental factors
  • Radon-induced background components

Purpose of the Study:

  • Identify background sources in a BEGe HPGe detector
  • Implement and optimize background reduction strategies
  • Quantify background reduction effectiveness

Main Methods:

  • Cosmic veto installation and optimization
  • Digital acquisition system with time-stamped data
  • Calculation of thermal and fast neutron fluxes

Main Results:

  • Total background reduced by a factor of 1.4
  • Significant reduction in radon-induced background
  • Optimized cosmic veto using digital acquisition

Conclusions:

  • Effective background reduction strategies for HPGe detectors in surface labs
  • Cosmic veto and data acquisition are crucial for minimizing background
  • Understanding and mitigating radon background is essential