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. Piasecki⁴, 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 National Research Centre “Kurchatov Institute”, Moscow, Russia
⁸ Taras Shevchenko Kyiv National University, Kyiv, Ukraine

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

Abstract: New angular distributions of the ¹⁵N + ¹²C elastic and inelastic scattering were measured at the energy E_lab (¹⁵N) = 81 MeV. The data were analyzed within the coupled-reaction-channels method (CRC). The elastic and inelastic scattering as well as the more important one- and two-step transfer reactions were included in the channels-coupling scheme. The ¹⁵N + ¹²C double folding-potential (DF) and that of Woods - Saxon form (WS) were used in the CRC-calculations. The WS potential parameters as well as deformation parameters of ¹²C and ¹⁵N were deduced. The contributions of one- and two-step transfers in the ¹⁵N + ¹²C elastic and inelastic scattering channels were obtained. The ¹⁵N +¹²C elastic scatterings data, published previously at energies E_lab(¹⁵N) = 22 – 31 MeV for the large angles, were also analyzed and energy dependence of the WS potential parameters were deduced. Comparing the data of elastic scattering data of the ¹⁵N + ¹²С and ¹⁴N + ¹²С nuclei and CRC calculations of the ¹⁵N + ¹²С scattering with WS potentials of these two nuclear pares, considerable differences were observed as in the experimental data so in the CRC calculations, especially at the large angles where the transfer reactions contribute to the elastic scattering. By other words, the scattering isotopic effects were observed in scattering of nuclei ¹⁵N + ¹²С and ¹⁴N + ¹²С.

Keywords: heavy-ion scattering, optical model, coupled-reaction-channels method, spectroscopic amplitudes, optical potentials, reaction mechanisms.

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