Abstract
Activation techniques have been used to measure cross sections for the 47Ti(n, p) 47Sc, 48Ti(n, p) 48Sc and 48Ti(n, np) 47Sc+ 48Ti(n, d) 47Sc reactions between 14.3 and 19.1 MeV. Gamma rays from the decay of the residual nuclei were detected using a Ge(Li) detector with an energy resolution of 2.0 keV FWHM at 1.33 MeV. The mixed powder method was employed at all neutron energies to determine the neutron flux, and the associated particle method was used to check the mixed powder flux measurements at 14.3 Mev. Good agreement with the results of previous measurements was obtained for the average cross sections of the 48T(n, p) 48Sc and 48T(n, np) 47Sc+ 48Ti(n, d) 47Sc reactions. However, the measured cross sections for the 47T(n, p) 47Sc reaction were consistently 20% above previously reported data. Measured cross sections for the 47Ti(n, p) 47Sc reaction are 158±9, 142±12, 131±7, 103±6, 125±10 and 122±9 mb at 14.3±0.3, 14.9±0.6, 16.2±0.2, 17.1 ±0.1, 18.2 ±0.1 and 19.1 ±0.1 MeV, respectively. Over this same range of neutron energies, measured cross sections for the 48Ti(n, p) 48Sc reaction are 72± 3, 69± 6, 60± 4, 50± 2 and 48± 4 mb, and measured cross sections for the 48Ti(n, np) 4Sc+ 48Ti(n, d) 47Sc reactions are 9.5±0.6, 14.8±1.5, 24.6±1.6, 52.5±2.7 and 97.8±8.8mb, respectively.
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