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. Rudchik, V. O. Romanyshyn, V. M. Kyryanchuk, O. A. Ponkratenko, V. V. Uleshchenko

Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine

Abstract: ⁷Li + ⁹Bе and ⁷Bе + ⁹Bе elastic scattering data at the energies Е_lab(⁷Li) = 15.75, 24, 30, 34 МеV and Е_lab(⁷Ве) = 17, 19 and 21 МеV were analyzed within the optical model and coupled-reaction-channels method taking into account ⁷Li, ⁷Bе and ⁹Bе reorientations, as well as one- and two-step transfers for these scattering. Sets of optical model parameters were deduced for the interaction of ⁷Li + ⁹Bе and ⁷Bе + ⁹Bе nuclei, as well as their energy dependence and mechanism of the elastic scattering of these nuclei was obtained. Isobaric and isotopic differences for the parameters of ⁷Li + ⁹Bе-, ⁷Bе + ⁹Bе- and ⁸Bе + ⁹Bе-potentials were studied.

1. Verma S., Das J. J., Jhingan A. et al. Measurements of elastic scattering for ⁷Be, ⁷Li + ⁹Be systems and fusion cross sections for ⁷Li + ⁹Be system. Eur. Phys. J. Special Topics 150 (2007) 75. https://doi.org/10.1140/epjst/e2007-00270-0

2. Weber K. A., Meier-Ewert K., Schidt-Böcking H., Bethge K. Elastic scattering of ⁷Li from light target nuclei. Nucl. Phys. A 186 (1972) 145. https://doi.org/10.1016/0375-9474(72)90130-3

3. Kemper K. W., Moore G. E., Puigh R. J., White R. I. Spectroscopic information from the ⁹Be(⁷Li, ⁶He)¹⁰B and ⁹Be(⁷Li, ⁶Li)¹⁰Be reactions. Phys. Rev. C 15 (1977) 1726. https://doi.org/10.1103/PhysRevC.15.1726

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

5. Romanyshyn V. О., Rudchik А. Т., Koshchy E. І. et al. Mechanism of ⁷Li(¹⁰B, ¹⁰Bе)⁷Bе reaction and ⁷Bе + ¹⁰Bе-potential. In Proceedings of the 2-nd Int. Conf. "Current Problems in Nuclear Physics and Atomic Energy", Kyiv, June 9 - 15, 2008: Book of Abstracts (Kyiv, 2008) p. 145.

6. Videbæk F., Christensen P. R., Hansen Ole, Ulbak K. Coulomb-nuclear interference and nuclear reorientation in the scattering of ^16,18O by ⁵⁸Ni and ⁶⁴Ni. Nucl. Phys. A 256 (1976) 301. https://doi.org/10.1016/0375-9474(76)90110-X

7. 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

8. 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.

9. 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.

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

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

12. 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

13. Rudchik A. T., Budzanowski A., Chernievsky V. K. et al. The ¹¹B + ¹²C elastic and inelastic scattering at E_lab(¹¹B) = 49 MeV and energy dependence of the ¹¹B + ¹²C interaction. Nucl. Phys. A 695 (2001) 51. https://doi.org/10.1016/S0375-9474(01)01106-X

14. Mahaux C., Ngǒ H., Satchler G. R. Casuality and the threshold anomaly of the nucleus-nucleus potential. Nucl. Phys. A 449 (1986) 354. https://doi.org/10.1016/0375-9474(86)90009-6

15. 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

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. 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

18. 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

19. Rudchik A. A., Rudchik A. T., Ponkratenko O. A., Kemper K. W. The approach of coupled reaction channels to ⁷Li + ¹¹B scattering. Ukr. Phys. J. 50 (2005) 907.

20. Rudchik A. T., Kyryanchuk V. M., Budzanowski A. et al. Mechanism of large angle enhancement of the ⁹Be + ¹¹B scattering. Nucl. Phys. A 714 (2003) 391. https://doi.org/10.1016/S0375-9474(02)01391-X