The cross section of the Al27(n,)24Na reaction relative to that of the U238(n,f) has been measured by the activation technique in the 7.13 9.01 MeV energy region. The neutron energy resolution varied between 70 and 130 keV (FWHM). The characteristics of the neutron source such as the mean energy of the neutrons and the energy distribution of the neutron flux have been determined experimentally and were validated with theoretical model calculations. The applied experimental techniques made it possible to decrease the overall uncertainty of the measurements to 2 3 %. The results confirm that the excitation function in the investigated energy region has a resonance structure as observed by Schmitt and Halperin in 1961. By using the data obtained for the energy distribution of the neutrons the true excitation function has been restored and the parameters of the Lorentz-type peaks have been calculated.
ASJC Scopus subject areas
- Nuclear and High Energy Physics