Nuclear Physics and Atomic Energy

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

 Home page   About 
Nucl. Phys. At. Energy 2018, volume 19, issue 4, pages 341-349.
Section: Nuclear Physics.
Received: 24.09.2018; Accepted: 11.10.2018; Published online: 14.02.2019.
PDF Full text (ua)

Mechanisms of 13C(11B,7Li)17O reaction at the 11B ion energy 45 MeV

S. Yu. Mezhevych1, A. T. Rudchik1,*, K. Rusek2, K. W. Kemper3, A. A. Rudchik1, O. A. Ponkratenko1, S. B. Sakuta4

1 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:

Abstract: Reaction 13C(11B,7Li)17O at the energy lab(11B) = 45 MeV for the ground and excited states of the 7Li and 17O nuclei was studied. The reaction experimental data were analyzed within the coupled-reaction-channels method (CRC). The 13C + 11B elastic scattering channel and one- and two-step reactions transferring nucleons and clusters were included in the coupling scheme. The spectroscopic amplitudes of nucleons and clusters needed for the CRC-calculations were computed within the translationally invariant shell model (TISM). The Woods-Saxon (WS) potential was used for the entrance reaction channel with the parameters deduced from the CRC-analysis of the 11B + 13C elastic scattering experimental data when the potential WS and the folding-potential (DF) with imaginary part, parameters of which were deduced from the fitting of the CRC cross sections to the 13C(11B,7Li)17O reaction experimental data, were used for the exit 7Li + 17O reaction channel. The parameters of the imaginary WS-potential were deduced in the same way. The parameters of the real part of this potential were obtained by fitting it to the peripheral region of the DF-potential. Isotopic differences of the 13C(11B,7Li)17O reaction cross sections using the parameters of 7Li + 17O, 7Li + 16 and 7Li + 18O interaction for the exit reaction channel were observed.

Keywords: nuclear reactions, optical model, coupled-reaction-channels method, folding-model, spectroscopic amplitudes, optical potentials, reaction mechanisms.


1. S.Yu. Mezhevych et al. Cluster structure of 17O. Phys. Rev. C 95 (2017) 034607.

2. A.T. Rudchik et al. 6Li(18O,17O)7Li reaction and comparison of 6,7Li + 16,17,18O potentials. Nucl. Phys. A 927 (2014) 209.

3. S.Yu. Mezhevych et al. The 13C + 11B elastic and inelastic scattering and isotopic effects in the 12,13C + 11B scattering. Nucl. Phys. A 724 (2003) 29.

4. M. Kowalczyk. SMAN: a Code for Nuclear Experiments. Warsaw University report (1998).

5. B. Guo et al. New determination of the 13C(α,n)16O reaction rate and its influence on the s-process nucleosynthesis in AGB stars. The Astrophysical J. 756(2) (2012) 193.

6. A.A. Rudchik et al. Elastic and inelastic scattering of 7Li + 18O versus 7Li + 16O. Nucl. Phys. A 785 (2007) 293.

7. A.T. Rudchik et al. Tensor analyzing powers and energy dependence of the 7Li + 16O interaction. Phys. Rev. C 75 (2007) 024612.

8. A.T. Rudchik et al. 8Li optical potential from 7Li(18O,17O)8Li reaction analysis. Nucl. Phys. A 831 (2009) 139.

9. J. Cook. DFPOT: A program for the calculation of double folded potentials. Comp. Phys. Com. 25 (1982) 125.

10. H. De Vries, C.W. De Jager, C. De Vries. Nuclear charge-density-distribution parameters from elastic electron scattering. Atomic Data and Nuclear Data Tables 36 (1987) 495.

11. Yu.F. Smirnov, Yu.M. Tchuvil'sky. Cluster spectroscopic factors for the p-shell nuclei. Phys. Rev. C 15 (1977) 84.

12. N. Boyarkina. The Structure of the 1-Shell Nuclei (Moskva: Moscow University, 1973) 62 p. (Rus)

13. A.T. Rudchik, Yu.M. Chuvilskij. Calculation of spectroscopic amplitudes for arbitrary associations of nucleons in nuclei 1p-shell (program DESNA). Preprint of the Institute for Nucl. Res. AS USSR. KINR-82-12 (Kyiv, 1982) 27 p. (Rus)

14. A.T. Rudchik, Yu.M. Chuvilskij. Spectroscopic amplitudes of multi-nucleon clusters in 1p-shell nuclei and analysis of reactions of multi-nucleon transmissions. Ukr. Fiz. Zhurnal 30(6) (1985) 819. (Rus)

15. I.J. Thompson. Coupled reaction channels calculations in nuclear physics. Comp. Phys. Rep. 7 (1988) 167.

16. D. Pereira et al. An imaginary potential with universal normalization for dissipative processes in heavy-ion reactions. Phys. Lett. B 670(4-5) (2009) 330.