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   Periodicity: 4 times per year   Open access peer reviewed journal

Full text (ua)

A. T. Rudchik¹, R. M. Zelinskyi¹, A. A. Rudchik¹, Val. M. Pirnak¹, S. Kliczewski², E. I. Koshchy³, K. Rusek^4,5, V. A. Plujko⁶, O. A. Ponkratenko¹, S. Yu. Mezhevych¹, A. P. Ilyin¹, V. V. Uleschenko¹, R. Siudak⁴, J. Choiński⁶, B. Czech⁴, A. Szczurek<sup>4

1</sup>Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
²H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland
³V. N. Karazin Kharkiv National University, Kharkiv, Ukraine
⁴National Centre for Nuclear Research, Warsaw, Poland
⁵Heavy Ion Laboratory, Warsaw University, Warsaw, Poland
⁶Kyiv Taras Shevchenko National University, Kyiv, Ukraine

Abstract: Angular distributions of the ⁶Li + ¹⁸O elastic and inelastic scattering as well as the ⁶Li(¹⁸O, Х) reactions with production of ^16,17,19O + ^8,7,5Li, ^14,15,16,17N + ^10,9,8,7Be and ^12,13,14C + ^12,11,10B nuclei were measured at E_lab(¹⁸O) = 114 MeV. The data were analyzed within the optical model and coupled-reaction-channels method. The ⁶Li + ¹⁸O optical potential parameters as well as deformation parameters of these nuclei were deduced and the scattering mechanisms were studied. The isotopic differences between the ^6,7Li + ¹⁸O and ⁶Li + ^16,18O scattering as well as their potential parameters were investigated.

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

1. Giesen U., Browne C. P., Gorres J. et al. The influence of low-energy resonances on the reaction rate of ¹⁸O(α, γ)²²Ne. Nucl. Phys. A 567 (1994) 146. https://doi.org/10.1016/0375-9474(94)90731-5

2. Rudchik А. А., Rudchik А. Т., Kliczewski S. et al. Elastic and inelastic scattering of ⁷Li + ¹⁸O versus ⁷Li + ¹⁶O. Nucl. Phys. A 785 (2007) 293. https://doi.org/10.1016/j.nuclphysa.2007.01.001

3. Рудчик А. Т., Зелінський Р. М., Плюйко В. А. та ін. Енергетична залежність розсіяння ядер ⁶Li + ¹⁶О та ізотопічні відмінності потенціалів взаємодії ядер ^6,7Li + ¹⁶О. Ядерна фізика та енергетика 13 (2012) 237. https://jnpae.kinr.kyiv.ua/13.3/Articles_PDF/jnpae-2012-13-0237-Rudchik.pdf

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

5. Vineyard M. F., Kemper K. W., Cook J. Excitation of ⁶Li by ¹⁶O at E_c.m. = 18.7 MeV. Phys. Lett. B 142 (1984) 249. https://doi.org/10.1016/0370-2693(84)91192-4

6. Smirnov Yu. F., Tchuvil'sky Yu. M. Cluster spectroscopic factors for the p-shell nuclei. Phys. Rev. C 15 (1977) 84. https://doi.org/10.1103/PhysRevC.15.84

7. Рудчик A. T., Чувильский Ю. М. Вычисление спектроскопических амплитуд для произвольных ассоциаций нуклонов в ядрах 1р-оболочки (программа DESNA). Препр. АН УССР. Ин-т ядерных исслед.; КИЯИ-82-12 (Киев, 1982) 27 с.

8. Рудчик A. T., Чувильский Ю. М. Спектроскопические амплитуды многонуклонных кластеров в ядрах 1р-оболочки и анализ реакций многонуклонных передач. Укр. фіз. журнал 30 (1985) 819.

9. Бояркина А. Н. Структура ядер 1р-оболочки (Москва: Изд-во Москов. ун-та, 1973) 62 с.

10. Nilsson B. S. SPI-GENOA: an Optical Model Search Code. Report (A Niels Bohr Institute, 1976).

11. Thompson I. J. Coupled reaction channels calculations in nuclear physics. Comp. Phys. Rep. 7 (1988) 167. https://doi.org/10.1016/0167-7977(88)90005-6

12. Cook J. DFPOT - a program for the calculation of double folded potentials. Comp. Phys. Com. 25 (1982) 125. https://doi.org/10.1016/0010-4655(82)90029-7

13. De Vries H., De Jager C. W., De Vries C. Nuclear charge-density-distribution parameters from elastic electron scattering. Atomic Data and Nuclear Data Tables 36 (1987) 495. https://doi.org/10.1016/0092-640X(87)90013-1

14. Rudchik A. T., Shyrma Yu. O., Kemper K. W. et al. Isotopic effects in elastic and inelastic ¹²C + ^16,18O scattering. Eur. Phys. J. A 44 (2010) 221. https://doi.org/10.1140/epja/i2010-10953-7

15. Rudchik A. T., Shyrma Yu. O., Kemper K. W. et al. Elastic and inelastic scattering of ¹³C + ¹⁸O versus ¹²C + ¹⁸O and ¹³C + ¹⁶O. Nucl. Phys. A 852 (2011) 1. https://doi.org/10.1016/j.nuclphysa.2011.01.004

16. Rudchik A. T., Shyrma Yu. O., Kemper K. W. et al. Elastic and inelastic scattering of ¹⁴C + ¹⁸O versus ^12,13C + ¹⁸O and ¹⁴C + ¹⁶O. Eur. Phys. J. A 47 (2011) 50. https://doi.org/10.1140/epja/i2011-11050-3

17. Rudchik A. T., Romanyshyn V. O., Koshchy E. I. et al. Isotopic effects in the ⁷Li + ^10,11B elastic and inelastic scattering. Eur. Phys. J. A 33 (2007) 317. https://doi.org/10.1140/epja/i2007-10483-5

18. Rudchik A. A., Rudchik A. T., Kozeratska G. M. et al. ⁷Li + ¹¹B elastic and inelastic scattering in a coupled-reaction-channels approach. Phys. Rev. C 72 (2005) 034608. https://doi.org/10.1103/PhysRevC.72.034608

19. Mezhevych S. Yu., Rusek K., Rudchik A. T. et al. The ¹³C + ¹¹B elastic and inelastic scattering and isotopic effects in the ^12,13C + ¹¹B scattering. Nucl. Phys. A 724 (2003) 29. https://doi.org/10.1016/S0375-9474(03)01478-7