Updating of a theoretical evaluation by experimental data in the case of 56Fe

The neutron total and partial reaction cross sections and their pertinent covariance matrices for the 56Fe nucleus from the EFF-2 evaluated data file were updated by using experimental data available from the EXFOR data base. To this aim an extended version of the GLUCS code, based on the Bayesian method, was developed and applied. Attention was paid to the construction of a realistic covariance matrix for each individual experimental data set. 40 groups were used for the presentation of the cross sections and matrices in the energy range between 0.85 MeV and 20 MeV. The procedure we applied has shown its ability to improve the quality of the evaluated data files