Title: Low Energy Transmission Measurements of 240,242Pu at GELINA and their Impact on the Capture Width
Authors: KOPECKY StefanSIEGLER PeterMOENS Andre
Citation: Proceedings of the ND 2007 International Conference on Nuclear Data for Science and Technology vol. 1 p. 623-626
Publisher: EDP Sciences
Publication Year: 2008
JRC N°: JRC47095
URI: http://nd2007.edpsciences.org/
http://publications.jrc.ec.europa.eu/repository/handle/JRC47095
DOI: 10.1051/ndata:07391
Type: Contributions to Conferences
Abstract: We present an approach to account for sample inhomogeneities as observed in thin powder samples. To test this model a series of transmission measurements on enriched 240Pu and 242Pu oxide samples was carried out. These measurements were performed at GELINA, the pulsed, white neutron source at the Institute for Reference Materials and Measurements in Geel. For all samples a mixture of PuO2 and graphite powder was used. To reduce the influence of the models for Doppler broadening on the extracted resonance parameters, measurements were performed with sample temperatures of approximately 12 K, 77K and 300 K. To describe the variation in the sample thickness, caused by the particle distribution in a thin powder sample, a Monte Carlo and an analytical description were used in the resonance shape analysis. The values and uncertainties of the extracted resonance parameters are discussed, and suggestion for future measurements are given.
JRC Institute:Institute for Reference Materials and Measurements

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