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The D-T neutron induced fission fragments from 238U, i.e., 134Te, 134 mI and 134 gI, were measured by low-background HPGe-γ detector. The fission cross-sections of the 238U(n, f) 134Te, 238U(n, f))134 mI and 238U(n, f)134 gI reactions induced by D-T neutrons, i.e., 14.7 ± 0.3, 14.5 ± 0.3 and 14.1 ± 0.3 MeV, were measured precisely with the neutron activation technique, where the neutron flux was monitored by accompanying α-particle and the neutron energy was determined by the cross-section ratio of 90Zr(n, 2 n)89Zr to 93Nb(n, 2 n)92 mNb reaction. The fission cross-sections of the 238U(n, f)134Te reaction are 54.3 ± 3.5 mb, 52.6 ± 3.4 mb and 50.0 ± 3.2 mb, corresponding to the above energy points. However, the cross-sections of 238U(n, f)134 gI reactions were estimated to be below a value about 8.2 × 10−3 mb, since almost all the 134 gI nuclide, of which characteristic γ-rays were detected in the spectrum, originated from the 134Te decay. Meanwhile, the characteristic γ-rays of 134 mI were not found on any spectrum, and beyond the lower limit of measurement.

Neutron induced the (n, 2n) reaction cross sections of platinum isotopes (190Pt, 192Pt, 196Pt and 198Pt) were well measured by the neutron activation and off-line gamma-ray technique around neutron energy of 14 MeV. During the irradiating time, the flux fluctuation of generating neutron was monitored by accompanying α-particle, while the cross section-ratio of 90Zr (n, 2n)89Zr to 93Nb(n, 2n)92mNb reactions were used to determine the neutron energies, which varied with the emission angle. As a result, the cross sections of 190Pt (n, 2n)189Pt, 192Pt (n, 2n)191Pt, 196Pt (n, 2n)195mPt, 198Pt (n, 2n)197mPt and 198Pt (n, 2n)197gPt reactions have been deduced at En = 14.1 ± 0.2 MeV, 14.5 ± 0.2 MeV and 14.7 ± 0.1 MeV, respectively. Meanwhile, the comparisons between this work and the literature date were given, as well as evaluated nuclear data and simulation data (ENDF/B-VIII.0, JEFF 3.3, ROSFOND-2010, JENDL/AD-2017 and Talys 1.9). The results shows an agreement with literature work as a whole, except the 196Pt (n, 2n)195mPt reaction.