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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А. Т. Rudchik^1,*, А. А. Rudchik¹, О. E. Kutsyk¹, К. Rusek², K. W. Kemper³, E. Piasecki², A. Stolarz², A. Trczinska², Val. М. Pirnak¹, О. А. Ponkratenko¹, I. Strojek⁴, E. І. Koshchiy⁵, R. Siudak⁶, S. B. Sakuta⁷, V. A. Plujko⁸, А. P. Ilyin¹, Yu. M. Stepanenko¹, V. V. Uleshchenko¹, Yu. O. Shyrma<sup>1

1</sup> Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
² Heavy Ion Laboratory, Warsaw University, Warsaw, Poland
³ Physics Department, Florida State University, Tallahassee, USA
⁴ National Institute for Nuclear Research, Warsaw, Poland
⁵ Cyclotron Institute, Texas A&M University, College Station, USA
⁶ H. Niewodniczanski Institute of Nuclear Physics, Krakow, Poland
⁷ Russian Research Centre “Kurchatov Institute”, Moscow, Russia
⁸ Taras Schevchenko Kyiv National University, Kyiv, Ukraine


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

Abstract: The ¹²С(¹⁵N, ¹⁴С)¹³N reaction at the energy Е_lab(¹⁵N) = 81 MeV for ground and excited states of ¹⁴С and ¹³N nuclei was investigated. New experimental data of the reaction cross-sections were obtained. The data were analyzed within the coupled reaction channels method (CRC). The ¹⁵N + ¹²С elastic scattering as well as the more important reactions of nucleon and cluster transfers were included in the channels-coupling scheme. In the CRC-calculations, the Woods - Saxon potentials (WS) were used for the interactions of ¹⁵N + ¹²С and ¹⁴С + ¹³N nuclei in the entrance and exit reaction channels. WS potential parameters for the reaction entrance channel were deduced previously from CRC-analysis of the ¹⁵N + ¹²С elastic and inelastic scattering data, then the WS potential parameters for the reaction exit channel were deduced from the fitting of ¹²С(¹⁵N, ¹⁴С)¹³N reaction data. The spectroscopic amplitudes of nucleons and clusters, used in the CRC-calculations, were computed within translational invariant shell model. As the results of the reaction CRC-analysis, the information about WS potential of ¹⁴С + ¹³N nuclei interaction as well as about mechanisms of nucleons and clusters transfer was deduced. It was found, that transfers of protons and 2n-clusters dominate in this reaction. It was also studied the differences of the reaction CRC cross-sections calculated using the ¹⁴С + ¹³N і ¹⁴С + ¹⁴N potentials in the reaction exit channel (isotopic effects).

Keywords: nuclear reaction ¹²С(¹⁵N, ¹⁴С)¹³N at 81 MeV, coupled reaction channels method, spectroscopic amplitudes of nucleons and clusters, reaction mechanisms.

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