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Characterisation, modelling and optimisation of the model of a HPGe detector with the aid of point sources

Authors
Journal
Applied Radiation and Isotopes
0969-8043
Publisher
Elsevier
Publication Date
Volume
68
Identifiers
DOI: 10.1016/j.apradiso.2009.11.022
Keywords
  • Hpge Detectors
  • Monte Carlo
  • Mcnpx
  • Isocs
  • Point Source Measurements
  • Detector Model
Disciplines
  • Physics

Abstract

Abstract A virtual model of a Canberra HPGe detector was produced with the aid of MCNPX and of different point sources. The measured and expected count rates were compared. The initial results showed significant discrepancies, therefore additional parametric simulations have been used to improve the model. As a result, the agreement between theoretical and measured performances in the middle–upper part of the spectrum improved, while low energy photons still score the worst, due to incomplete knowledge of the inner structure of the housing that would require additional extensive measurements.

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