https://doi.org/10.1140/epjp/i2014-14058-6
Regular Article
Measurement of the direct particle transport through stochastic media using neutron resonance transmission analysis
1
European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440, Geel, Belgium
2
Japan Atomic Energy Agency, 319-1195, Ibaraki, Japan
* e-mail: bjorn.becker@ec.europa.eu
Received:
22
November
2013
Revised:
16
January
2014
Accepted:
7
February
2014
Published online:
15
April
2014
A measurement of the uncollided neutron flux passing through a sample containing a stochastic mixture of tungsten and sulfur grains has been performed using neutron resonance transmission analysis in the 3-200eV energy region. The impact of the heterogeneous characteristic of the sample is shown, based on a comparison of the measurement with a calculated transmission spectrum of a homogeneous sample, which was verified by a measurement with a homogeneous metallic disc. By using a single strong resonance of tungsten, the particle self-shielding factor between 0.2–0.9 was directly measured. The experimental data have been compared with model calculations using the Markovian Levermore-Pomraning model. The measured transmission has been used to determine the effective characteristic chord length and volume fraction of the tungsten grains within the sample.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2014
