Covariance of Neutron Cross Sections for 16O through R-matrix Analysis

Through the R-matrix analysis, neutron cross sections as well as the covariance are estimated for 16O in the resolved resonance range. Although we consider the current results are still preliminary, we present the summary of the cross section analysis and the results of data uncertainty/covariance, including those for the differential cross sections. It is found that the values obtained highlight consequences of nature in the theory as well as knowledge from measurements, which gives a realistic quantification of evaluated nuclear data covariances.