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Experimental cross sections for formation of isotopes ${}^{44,46}$Sc and ${}^{45}$Ti in reactions ${}^{3,4,6}$He + ${}^{45}$Sc, ${}^{196,198}$Au in reactions ${}^{3,4,6,8}$He + ${}^{197}$Au, and ${}^{194}$Au in reaction ${}^{3}$He + ${}^{194}$Pt have been analyzed. To calculate nucleon transfer probabilities and cross sections, the time-dependent Schrödinger equation for nucleons of ${}^{3,4,6}$He, ${}^{45}$Sc, ${}^{197}$Au, and ${}^{194}$Pt has been solved numerically with a special choice of the shell model mean field for ${}^{3,4,6,8}$He nuclei [1] (Fig. 1). Fusion-evaporation channels were taken into account using the code of the NRV web knowledge base [2]. It was shown that the contribution of fusion-evaporation to the experimental data is significant for reactions ${}^{3,4,6}$He + ${}^{45}$Sc, whereas in the case of reactions ${}^{3,4,6,8}$He + ${}^{197}$Au and ${}^{3}$He + ${}^{194}$Pt, it is negligible. The results of calculation (Fig. 2) are in good agreement with experimental data [3, 4].
Fig. 1. Examples of time evolution of the probability density for the neutron of ${}^{3}$He in the collision ${}^{3}$He + ${}^{197}$Au at ${E_{{\rm{c}}{\rm{.m}}{\rm{.}}}}$ = 20 MeV and impact parameter b = 1 fm. The course of time corresponds to panel locations (a), (b), (c), (d).
Fig. 2. Cross sections for formation of the isotope ${}^{198}$Au in the reaction ${}^{3}$He + ${}^{197}$Au: experimental data [2] (filled squares) and [3] (empty squares) along with the results of calculations. The arrow indicates the position of the Coulomb barrier.
- M.A. Naumenko, V.V. Samarin, Yu.E. Penionzhkevich, and N.K. Skobelev, Bull. Russ. Acad. Sci.: Phys. 81, 710 (2017).
- NRV web knowledge base on low-energy nuclear physics, http://nrv.jinr.ru/nrv/.
- N.K. Skobelev, Yu.E. Penionzhkevich, E.I. Voskoboinik et al., Phys. Part. Nucl. Lett. 11, 114 (2014).
- Y. Nagame, K. Sueki, S. Baba, and H. Nakahara, Phys. Rev. C 41, 889 (1990).
| The speaker is a student or young scientist | No |
|---|---|
| Section | 2. Experimental and theoretical studies of nuclear reactions |
