Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English, Russian   Periodicity: 4 times per year   Open access peer reviewed journal

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S. Yu. Mezhevych ¹, A. T. Rudchik^1,*, K. Rusek², K. W. Kemper³, A. A. Rudchik¹, O. A. Ponkratenko¹, S. B. Sakuta<sup>4

1</sup> Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
² Heavy Ion Laboratory, University of Warsaw, Warsaw, Poland
³ Physics Department, Florida State University, Tallahassee, USA
⁴ National Research Center "Kurchatov Institute", Moscow, Russia

^*Corresponding author. E-mail address: rudchik@kinr.kiev.ua

Abstract: The reaction ¹³C(¹¹B,¹²C)¹²B at Е_lab(¹¹B) = 45 MeV was investigated for the ground states of ¹²C and ¹²B nuclei and excited states of ¹²B nucleus. New experimental data for the angular distributions of the reaction cross-sections were obtained. The experimental data were analyzed within the coupled-reaction-channels method (CRC). The ¹³C + ¹¹B elastic scattering channel as well as channels for one- and two-step transfers of nucleons and clusters were included in the coupling scheme. The Woods - Saxon (WS) potential was used in the CRC-calculations for the entrance reaction channel with parameters deduced previously from the analysis of the experimental data of ¹¹B + ¹³C elastic and inelastic scattering, whereas the WS potential for the exit ¹²C + ¹²B reaction channel was deduced from the fitting of CRC cross-sections to the ¹³C(¹¹B,¹²C)¹²B reaction experimental data. Needed for CRC-calculations spectroscopic amplitudes (factors) of the nucleons and clusters transferred in the reaction were calculated within the translational-invariant shell model. The direct mechanisms of the transfers of nucleons and clusters were investigated in this reaction. The ¹²С + ¹²В potential parameters were deduced and comparisons of the CRC reaction cross-sections calculated with the ¹²C + ¹²B and ¹²C + ^10,11B potential parameters were performed. The differences between these CRC calculations were observed. The "isotopic effects" were observed for the potentials of ¹²C interactions with boron isotopes ^{10, 11, 12}B.

Keywords: nuclear reaction ¹³C(¹¹B,¹²С)¹²В, coupled-reaction-channels method, spectroscopic amplitudes, optical potentials, reaction mechanisms.

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