Evaluation of Neutron Capture Cross Sections and Covariances on 99Tc and 129I in the keV Energy Region

摘要

Neutron capture cross sections and covariances on radioactive 99Tc and 129I have been required for developing environmental load-reducing technology. Their evaluation was performed by using nuclear reaction calculation code CCONE and Baysian code KALMAN with data assumed on the basis of measured data. The obtained total and capture cross sections are in good agreement with the measured data. The resulting uncertainties of capture cross section were 12–18% and 20–29% for 99Tc and 129I, respectively, in the keV energy region.