Journal of Radioanalytical and Nuclear Chemistry

, Volume 292, Issue 3, pp 1325–1328 | Cite as

Analytical calculation of the collimated detector response for the characterization of nuclear waste drums by segmented gamma scanning

  • Nan Qian
  • Thomas Krings
  • Eric Mauerhofer
  • Dezhong Wang
  • Yunfei Bai
Article

Abstract

Improved methods for the reconstruction of the isotope specific activity content in nuclear waste drums with data obtained by a gamma scanning system developed at Shanghai Jiao Tong University require an analytical function of the detector response. In this work we derive an analytical detector response function for a collimated HPGe detector with a square collimation window. The model is based on a purely geometric model respecting the configuration of the collimated detector system, the positions of radioactive point sources and the absorption of γ-rays in the matrix as well as in the HPGe crystal. We show that the derived analytical detector response function is in good agreement with data simulated by MCNP5.

Keywords

Nuclear waste Segmented gamma scanning Detector response 

Notes

Acknowledgments

This work was supported by the National Natural Science Foundation of China (contract number: 10675084).

References

  1. 1.
    Krings T, Mauerhofer E (2011) Reconstruction of the activity of point sources for the accurate characterization of nuclear waste drums by segmented gamma scanning. Appl Radiat Isot 69:880CrossRefGoogle Scholar
  2. 2.
    Helmer RG, Hardy JC, Iacob VE, Sanchez-Vega M, Neilson RG, Nelson J (2003) The use of Monte Carlo calculations in the determination of a Ge detector efficiency curve. Nucl Instrum Methods Phys Res A 511:360CrossRefGoogle Scholar
  3. 3.
    Ludington MA, Helmer RG (2000) High accuracy measurements and Monte Carlo calculations of the relative efficiency curve of an HPGe detector from 433 to 2754 keV. Nucl Instrum Methods Phys Res A 446:506CrossRefGoogle Scholar
  4. 4.
    Ewa IOB, Bodizs D, Czifrus Sz, Molnar Zs (2001) Monte Carlo determination of full energy peak efficiency for a HPGe detector. Appl Radiat Isot 55:103CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2012

Authors and Affiliations

  • Nan Qian
    • 1
    • 2
  • Thomas Krings
    • 2
  • Eric Mauerhofer
    • 2
  • Dezhong Wang
    • 1
  • Yunfei Bai
    • 1
  1. 1.School of Nuclear Science and EngineeringShanghai Jiao Tong UniversityShanghaiChina
  2. 2.Institute of Energy and Climate Research—Nuclear Waste ManagementForschungszentrum Jülich GmbhJülichGermany

Personalised recommendations