New experimental data on excitation functions of 3He-induced nuclear reactions on Ta up to 27 MeV

Ali, B. M. and Mohamed, Gehan Y. and Ditrói, F. and Takács, S. and Al-Abyad, M. (2020) New experimental data on excitation functions of 3He-induced nuclear reactions on Ta up to 27 MeV. PHYSICAL REVIEW C, 102 (6). pp. 1-11. ISSN 2469-9985 (print); 2469-9993 (online)

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Abstract

Excitation functions of 3He-induced nuclear reactions on natTa 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 natTa(3He, xn) 182Rem, 182Reg, 181Re, and natTa(3He, αxn) 178TaA, 180Tag reactions were measured. The half-life of the radionuclide 181Re was checked experimentally. The intensity of the energy line 360.7 keV, in the radionuclide 181Re 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 182Re m,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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