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

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A. T. Rudchik¹, Yu. M. Stepanenko¹, A. A. Rudchik¹, O. A. Ponkratenko¹, E. I. Koshchy², S. Kliczewski³, K. Rusek⁴, A. Budzanowski³, S. Yu. Mezhevych¹, Val. M. Pirnak¹, I. Skwirczyńska³, R. Siudak³, B. Czech³, A. Szczurek³, J. Choiński⁵, L. Głowacka<sup>6

1</sup>Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
²Kharkiv National University, Kharkiv, Ukraine
³H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland
⁴Soltan Institute for Nuclear Studies, Warsaw, Poland
⁵Heavy Ion Laboratory, Warsaw University, Warsaw, Poland
⁶Institute of Applied Physics of the Military University of Technology, Warsaw, Poland

Abstract: Angular distributions of the ⁷Li(¹⁸O, ¹⁷N)⁸Be reaction were measured for the transitions to the ground states of ⁸Be and ¹⁷N and excited states of ¹⁷N at the energy E_lab(¹⁸O) = 114 MeV. The data were analyzed with coupled-reaction-channels method for one- and two-step transfers of nucleons and clusters. In the analysis, the ⁷Li + ¹⁸O potential deduced in the analysis of the elastic ⁷Li + ¹⁸O-scattering data as well as shell-model spectroscopic amplitudes of transferred nucleons and clusters were used. Parameters of the ⁸Be + ¹⁷N potential were deduced using the reaction data. Contributions of different one- and two-step transfers in the ⁷Li(¹⁸O, ¹⁷N)⁸Be reaction cross-section were studied.

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

1. Rudchik A. A., Rudchik A. T., 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

2. Rudchik A. A., Rudchik A. T., Budzanowski A. et al. Mechanism of ¹²C(¹¹B, ¹⁵N)⁸Be reaction and ⁸Be + ¹⁵N optical-model potential. Eur. Phys. J. A 23 (2005) 445. https://doi.org/10.1140/epja/i2004-10100-3

3. Rudchik A. T., Momotyuk O. A., Budzanowski A. et al. Energy dependence of the ⁸Be + ¹³C interaction. Nucl. Phys. A 660 (1999) 267. https://doi.org/10.1016/S0375-9474(99)00411-X

4. Romanyshyn V. O., Rudchik A. T., Kemper K. W. et al. ⁸Be scattering potentials from reaction analyses. Phys. Rev. C 79 (2009) 054609. https://doi.org/10.1103/PhysRevC.79.054609

5. Rudchik A. A., Stepanenko Yu.M., Kemper K. W. et al. ⁸Li optical potential from ⁷Li(¹⁸O, ¹⁷O)⁸Li reaction analysis. Nucl. Phys. A 831 (2009) 139. https://doi.org/10.1016/j.nuclphysa.2009.10.084

6. Рудчик А. Т., Степаненко Ю. М., Рудчик А. А. та ін. Реакція ⁷Li(¹⁸O, ¹⁷O)⁸Li та потенціал взаємодії ядер ¹⁷O + ⁸Li. Ядерна фізика та енергетика 10 (2009) 138. https://jnpae.kinr.kyiv.ua/10.2/Articles_PDF/jnpae-2009-10-0138-Rudchik.pdf

7. Kowalczyk M. SMAN: A Code for Nuclear Experiments. Report (Warsaw, Warsaw University, 1998) 32 p.

8. Чернієвський В. K., Русек K., Будзановскі A. та ін. Експериментальна установка для дослідження ядерних реакцій на Варшавському циклотроні U-200P. Зб. наук. праць Ін-ту ядерних досл. 3 (2002) 216. https://jnpae.kinr.kyiv.ua/03.2/Articles_PDF/jnpae-2002-03-2-216.pdf

9. Tilley D. R., Kelley J. H., Godwin J. L. et al. Energy Levels of Light Nuclei A = 8, 9, 10. Nucl. Phys. A 745 (2004) 155. https://doi.org/10.1016/j.nuclphysa.2004.09.059

10. Романишин В. О., Рудчик А. Т., Кощий Є.І. та ін. Механізми реакції ⁷Li(¹⁰B, ⁹Be)⁸Be, ¹⁰B(⁷Li, ⁹Be)⁸Be та потенціал взаємодії ядер ⁸Be + ⁹Be. Ядерна фізика та енергетика 9 (2008) 24. https://jnpae.kinr.kyiv.ua/24(2)/Articles_PDF/jnpae-2008-2(24)-0024-Romanyshyn.pdf

11. 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

12. 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.

13. 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.

14. 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

15. Tilley D. R., Weller H. R., Cheves C. M. Energy Levels of Light Nuclei A = 16-17. Nucl. Phys. A 564 (1993) 1. https://doi.org/10.1016/0375-9474(93)90073-7

16. Mohr P., Abele H., Kölle V. et al. Properties of ⁸Be and ¹²C deduced from the folding-potential model. Z. Phys. A 349 (1994) 339. https://doi.org/10.1007/BF01288987

17. 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

18. 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

19. Cook J. DFPOT - a program for the calculation of double folded potentials. Comp. Phys. Com. 35 (1984) C-775. https://doi.org/10.1016/S0010-4655(84)82902-1