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Neutron cross section covariances from thermal energy to 20 MeV

descriptionPublicationkeyboard_double_arrow_right Conference object , Other literature type , Article 01 Jan 2007 United States Publisher:EDP SciencesJournal:ND2007

Authors: Rochman, D.; Herman, M.; Oblozinsky, P.; Mughabghab, S. F.; Pigni, M.; Kawano, T.;

doi: 10.1051/ndata:07280

Neutron cross section covariances from thermal energy to 20 MeV

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Abstract

We describe new method for energy-energy covariance calculation from the thermal energy up to 20 MeV. It is based on three powerful basic components: (i) Atlas of Neutron Resonances in the resonance region; (ii) the nuclear reaction model code EMPIRE in the unresolved resonance and fast neutron regions, and (iii) the Bayesian code KALMAN for correlations and error propagation. Examples for cross section uncertainties and correlations on {sup 90}Zr and {sup 193}Ir illustrate this approach in the resonance and fast neutron regions.

Country

United States

Related Organizations

University of North Texas
United States
Los Alamos National Laboratory
United States
Brookhaven National Laboratory
United States
National Nuclear Data Center
National Nuclear Data Center

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Keywords

Neutrons, 73 Nuclear Physics And Radiation Physics, Resonance, 72 Physics Of Elementary Particles And Fields, Fast Neutrons, Nuclear Reactions, Cross Sections, Simulation

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