We present new results on neutron and gamma-ray pulse-height distributions measured with liquid scintillators from five plutonium-oxide samples of varying mass and burnup and a Cf-252 isotopic source. We show that the analysis of the pulse-height distributions can be used to easily distinguish the fissile material (plutonium oxide) from the Cf-252 source. Moreover, the slope of the measured pulse-height distributions can be analyzed to distinguish the burnup of the samples, independently of their mass. Finally, the measurement scenarios are modeled using the MCNP-PoliMi code and good agreement is observed between the measured and simulated pulse-height distributions.
POZZI Sara;
CLARKE Shaun D.;
FLASKA M.;
PEERANI Paolo;
2009-09-09
ELSEVIER SCIENCE BV
JRC51979
0168-9002,
http://www.sciencedirect.com/dx.doi.org/10.1016/j.nima.2009.07.007,
https://publications.jrc.ec.europa.eu/repository/handle/JRC51979,
10.1016/j.nima.2009.07.007,
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