Measurement of the neutron activation constants Q0 and k0 for the 27Al(n, γ)28Al reaction at the JSI TRIGA Mark II reactor

Measurements of the neutron activation constants Q0 and k0 for the 27Al(n, γ)28Al reaction have been performed in two irradiation channels with different spectral characteristics at the JSI TRIGA Mark II reactor. In the determination of Q0 the fission spectrum contribution to the reaction rates has been corrected for. The final experimental value of the Q0 factor was found to differ significantly from the adopted value in the k0-database. The experimental value of the k0 factor is in agreement with the recommended value in the k0-database. The thermal cross-section and resonance integral for the reaction were found to be in good agreement with the values calculated from the cross-sections from the ENDF/B-VII.1 library. (author)