Excitation functions of ${}^3\mathrm{He}$-induced nuclear reactions on ${}^{\mathrm{nat}}\mathrm{Ta}$ were measured utilizing the MGC-20E cyclotron, stacked-foils activation technique, and high-resolution gamma-ray spectrometry. From their threshold energies up to 27 MeV, cross sections for ${}^{\mathrm{nat}}\mathrm{Ta}({}^3\mathrm{He},xn){}^{182}\mathrm{Re}^{\mathrm{m}}, {}^{182}\mathrm{Re}^{\mathrm{g}}, {}^{181}\mathrm{Re}$, and ${}^{\mathrm{nat}}\mathrm{Ta}({}^3\mathrm{He},\alpha xn){}^{178}\mathrm{Ta}^{\mathrm{A}}, {}^{180}\mathrm{Ta}^{\mathrm{g}}$ reactions were measured. The half-life of the radionuclide ${}^{181}\mathrm{Re}$ was checked experimentally. The intensity of the energy line 360.7 keV, in the radionuclide ${}^{181}\mathrm{Re}$ decay scheme, was revised experimentally. The new experimental intensity represents about half the reported value in the different nuclear structure databases. The nuclear reaction codes TALYS-1.9 and EMPIRE-3.2.3 were used to predict the formation of these products. The isomeric cross-section ratio for the ${}^{182}\mathrm{Re}^{\mathrm{m},\mathrm{g}}$ was also calculated. The ratio indicates that the pre-equilibrium mechanism is dominant at energies over 19 MeV. Various combinations of the models’ parameters implemented in EMPIRE such as nuclear level density models, optical model, and pre-equilibrium parameters were used to reproduce the experimental excitation functions. For TALYS calculations, the TENDL-2019 nuclear data library based on TALYS-1.9 was used. The present data were compared to theoretical results and the available experimental data. Integral yields for the produced radioisotopes were determined.

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• Energy levels
• H & He induced nuclear reactions
• Models & methods for nuclear reactions
• Nuclear reactions
• Nuclear structure & decays