Measurement of .sup.59Co.sup.60Co reaction cross sections at the effective neutron energies of 11.98 and 15.75 MeV

The .sup.59Co(n, [gamma]).sup.60Co reaction cross sections have been measured relative to the cross sections of the .sup.115In [Formula omitted].sup.116mIn monitor reaction at the effective neutron energies of 11.98 and 15.75 MeV by using activation and off-line [gamma]-ray spectrometric technique. We generate and present the covariance information by taking into account various attributes influencing the uncertainties and also the correlations between them. The .sup.59Co(n, [gamma]).sup.60Co reaction cross sections from the present work have been compared with evaluated nuclear data libraries and theoretical values based on computer code TALYS-1.8.