Open Access
ND 2007
Article Number 176
Number of page(s) 4
Section Thermal and resonance range
Published online 17 June 2008
International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07374

239Pu neutron resonance parameters revisited and covariance matrix in the neutron energy range from thermal to 2.5 keV

H. Derrien, L.C. Leal and N.M. Larson

Oak Ridge National Laboratory, Oak Ridge, TN 37831-6171, USA

Published online: 21 May 2008

To obtain the resonance parameters in a single energy range up to 2.5 keV neutron energy and the corresponding covariance matrix, a reevaluation of 239Pu was performed with the analysis code SAMMY. The most recent experimental data were analyzed in the energy range thermal to 2.5 keV. The experimental data were renormalized, aligned on a common energy scale, and corrected for residual background. Average neutron transmission and cross sections calculated with the new resonance parameters were compared to the corresponding experimental data and to ENDF/B-VI.

© CEA 2008