[en] The sup(115)In(nγ)sup(116m)In, decay cross section is determined by studying γ-spectra of activation products of the indium sample irradiated by the 14.6 MeV DT-neutrons. Decay lines of ¹¹²In, sup(112m)In, sup(113m)In, sup(114m)In, sup(115m)In, sup(116m)In nuclei produced in the (n, 2n), (n, n') (nγ) reactions are observed. The comparison of intensities in observed γ-lines permits to obtain information on the relation of cross sections of the above reactions. Cross section of inelastic scattering on In isotopes is found to be σsub(n')(sup(113)In)=56.0+-3.6 mb, si5 sub(n')(sup(115)In)=62.1+-3.9 mb. Cross section values of the ¹¹⁵In(n, γ) sup(116m)In reaction are found to be (1.27+-0.20) and (1.08+-0.18) mb, respectively by using cross section of the sup(115)In(n, n) sup(115m)In and sup(113)In(n,n')sup(113m)In reactions as a basic