Radiation Protection Dosimetry Advance Access originally published online on June 2, 2007
Radiation Protection Dosimetry 2007 126(1-4):346-349; doi:10.1093/rpd/ncm072
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Determination of neutron energy spectra inside a water phantom irradiated by 64 MeV neutrons
1 Department of Physics, University of Cape Town, Rondebosch, Cape 7700, South Africa
2 iThemba LABS (Laboratory for Accelerator Based Sciences), PO Box 722, Somerset West 7129, South Africa
* Corresponding author: fbrooks{at}science.uct.ac.za
A NE230 deuterated liquid scintillator detector (25 mm diameter x 25 mm) has been used to investigate neutron energy spectra as a function of position in a water phantom under irradiation by a quasi-monoenergetic 64 MeV neutron beam. Neutron energy spectra are obtained from measurements of pulse height spectra by the NE230 detector using the Bayesian unfolding code MAXED. The experimentally measured energy spectra are compared with spectra calculated by Monte Carlo simulation using the code MCNPX.