A beam of 1 GeV proton coming from Dubna Nuclotron colliding with a lead target surrounded by 6 cm paraffin produces spallation neutrons. A Th-foil was kept on lead target (neutron spallation source) in a direct stream of neutrons for activation and other samples of ¹⁹⁷Au, ²⁰⁹Bi, ⁵⁹Co, ¹¹⁵In and ¹⁸¹Ta were irradiated by moderated beam of neutrons passing through 6 cm paraffin moderator. The gamma spectra of irradiated samples were analyzed using gamma spectrometry and DEIMOS software to measure the neutron cross-section. For this purpose neutron fluence at the positions of samples is also estimated using PREPRO software. The results of cross-sections for reactions ²³²Th($n, \gamma$), ²³²Th($n, 2n$), ¹⁹⁷Au($n, \gamma$), ¹⁹⁷Au($n, \alpha$), ¹⁹⁷Au($n, xn$), ⁵⁹Co($n, \alpha$), ⁵⁹Co($n, xn$), ¹⁸¹Ta($n, \gamma$) and ¹⁸¹Ta($n, xn$) are given in this paper. Neutronics validation of the Dubna Cascade Code is also done using cross-section data by other experiments.