Low-fidelity Covariance Project

The Low-Fidelity Covariance Project has developed a complete set of covariance data estimates for all ENDF/B-VII.0 isotopes. Covariance data are provided for elastic scattering, inelastic scattering, (n,2n) reactions, radiative capture and fission (cross section and nubar) over the energy range from 10 −5 eV to 20 MeV. Various approximations were utilized depending on the mass of the target, the neutron energy range, and the neutron reaction. The resulting covariance data are not an official part of ENDF/B-VII, but are available for testing in nuclear applications.

[1]  Phillip G. Young,et al.  Covariance matrices for ENDF/B-VII 235,238U and 239Pu evaluated files in the fast energy range , 2007 .

[2]  Said F. Mughabghab,et al.  Atlas of Neutron Resonances: Resonance Parameters and Thermal Cross Sections. Z=1-100 , 2006 .

[3]  R.E. MacFarlane,et al.  The NJOY Nu-clear Data Processing System Version 91 , 1994 .

[4]  D. Rochman,et al.  PRELIMINARY CROSS SECTION AND NU-BAR COVARIANCES FOR WPEC SUBGROUP 26 , 2007 .

[5]  Philip R. Page,et al.  ENDF/B-VII.0: Next Generation Evaluated Nuclear Data Library for Nuclear Science and Technology , 2006 .

[6]  B. Pritychenko,et al.  Sigma: Web Retrieval Interface for Nuclear Reaction Data , 2008 .

[7]  M. W. Herman,et al.  EMPIRE: Nuclear Reaction Model Code System for Data Evaluation , 2007 .

[8]  M. Pigni,et al.  Extensive Set of Cross-Section Covariance Estimates in the Fast Neutron Region , 2009 .

[9]  Dorothea Wiarda,et al.  Recent Advances with the AMPX Covariance Processing Capabilities in PUFF-IV , 2008 .

[10]  Arjan J. Koning,et al.  Local and global nucleon optical models from 1 keV to 200 MeV , 2003 .

[11]  Bradley T Rearden,et al.  SCALE-6 Sensitivity/Uncertainty Methods and Covariance Data , 2008 .

[12]  Bradley T Rearden,et al.  Approximate Techniques for Representing Nuclear Data Uncertainties , 2007 .

[13]  G. Hale Covariances from Light-Element R-Matrix Analyses , 2008 .

[14]  R. Little,et al.  Evaluation of Covariances for Actinides and Light Elements at LANL , 2008 .