Journal of Radioanalytical and Nuclear Chemistry

, Volume 295, Issue 2, pp 1487–1493 | Cite as

Quantifying the geometry correction factor and effectiveness parameter for Bonner sphere spectrometer with 3He counter

  • Rahim Khabaz
  • Reza Izadi Najafabadi


This paper presents the evaluation of the geometry correction factor for calibration of Bonner sphere spectrometer (BSS) equipped with the 3He counter (typical SP9), based on Monte Carlo simulation. Using the MCNP4C code, geometry factors and effectiveness parameters (δ) of a 8″ polyethylene sphere (r = 10.16 cm) were calculated for 10 different energies and 3 various distances between the source and center of the sphere. The obtained results showed that the geometry factor increases with the distance, and the effectiveness parameter is independent of distance. Finally, for 2″, 3″, 5″, 8″ and 12″ spheres exposed to four different radio-isotopic neutron sources with various energy spectrums, the effectiveness parameters were determined, which it is worthy to consider δ  δ(r, E).


Neutron spectrometry Bonner sphere Calibration Geometry factor Effectiveness parameter Monte Carlo 


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2012

Authors and Affiliations

  1. 1.Physics Department, Faculty of SciencesGolestan UniversityGorganIran
  2. 2.Physics Department, School of SciencesFerdowsi University of MashhadMashhadIran

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