Abstract
The fission cross-section of the 232Th(n,f)141Ba reaction induced by neutrons around 14MeV was measured precisely with the neutron activation and off-line gamma-ray spectrometric technique. Neutron fluence was monitored on-line using the accompanying $\alpha$ -particles from the 3H(2H,n)4He reaction, whereas the neutron energies were measured by the method of cross-section ratios of 90Zr(n,2n)89Zr to 93Nb(n,2n)92mNb reactions. The experimentally determined 232Th(n,f)141Ba reaction cross-sections were $12.2\pm 0.4$ mb at $E_{n} = 14.1 \pm 0.3$ MeV, 13.0±0.5 mb at $E_{n} = 14.5 \pm 0.3$ MeV and 13.3±0.5 mb at $E_{n} = 14.7 \pm 0.3$ MeV, respectively.
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