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Radiation Protection Dosimetry 2004 110(1-4):555-558; doi:10.1093/rpd/nch385
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Radiation Protection Dosimetry Vol. 110 Nos. 1-4 © Oxford University Press 2004; all rights reserved

Measurement and unfolding of neutron spectra using Bonner spheres

Adolfo Esposito* and Maitreyee Nandy{dagger}

Radiation Protection Group, INFN-LNF, via Enrico Fermi 40, 00044 Frascati, Italy

* Corresponding author: E-mail: Adolfo.Esposito{at}lnf.infn.it.

Neutron spectra from Am–Be, 252Cf sources and 2H + 2H and 2H + 3H reactions have been measured using a Bonner sphere system in conjunction with a 4 x 4 mm2 LiI(Eu) detector, and unfolded using the two codes BUNKI and MAXED. The BON unfolding algorithm is used with BUNKI. It has been observed that end test percentage between 1 and 3 and smoothing factor between 0.05 and 0.1 are optimal choices for the BUNKI code. A temperature parameter 1.0 is used for MAXED. Comparison with standard spectra shows that the shape of the spectra is fairly well reproduced. A coupling between the two codes is made and the solution spectrum from BUNKI is used as the default spectrum in MAXED.


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