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)

V. P. Verbitsky, V. О. Romanyshyn, К. О. Terenetsky

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

Abstract: Experimental elastic scattering cross sections of ⁶He ions by ⁵⁸Ni and ²⁰⁹Bi nuclei at 10 МеV and 14.7, 16.2, 17.8, 19.1, 22 МеV, respectively, are analyzed in the framework of optical model with electric optical potential using. This potential allows to take into account the polarizability and breakup of ⁶He projectile in the field of target nucleus in the effective way. The considerable influence of projectile breakup on elastic scattering cross sections formation near the Coulomb barrier is shown. The last fact is the direct evidence of dineutron configuration existence in the ground state in this exotic nucleus.

1. Forssen C., Efros V. D., Zhukov M. V. Analytical E1 strength function of two-neutron halo nuclei: the ⁶He example. Nucl. Phys. A 697 (2002) 639. https://doi.org/10.1016/S0375-9474(01)01260-X

2. Warner R. E., Becchetti F. D., Janecke J. W. et al. Elastic scattering of 10 MeV ⁶He from ¹²C, ^natNi, and ¹⁹⁷Au. Phys. Rev. C 51 (1995) 178. https://doi.org/10.1103/PhysRevC.51.178

3. Aguilera E. F., Kolata J. J., Becchetti F. D. et al. Elastic scattering and transfer in the ⁶He + ²⁰⁹Bi system below the Coulomb barrier. Phys. Rev. C 63 (2001) 061603(R). https://doi.org/10.1103/PhysRevC.63.061603

4. Mohr P. Folding potential for system ²⁰⁹Bi - ⁶He. Phys. Rev. C 62 (2000) 061601(R). https://doi.org/10.1103/PhysRevC.62.061601

5. Вербицкий В. П., Теренецкий К. О. Динамические эффекты в упругом рассеянии дейтронов тяжелыми ядрами. Укр. фіз. журнал 35 (1990) 515.

6. Вербицкий В. П., Теренецкий К. О. Подбарьерное рассеяние слабосвязанных нейтроно-избыточных легких ионов. Ядерная физика 55 (1992) 362.

7. Verbitsky V. P., Zhukalyuk L. Ya., Terenetsky K. O. Weakly bound particle in the electric field of nuclei. Укр. фіз. журнал 47 (2002) 10.

8. Frahn W. E. Wave mechanics of heavy-ion collisions. Ann. Phys. 72 (1972) 524. https://doi.org/10.1016/0003-4916(72)90226-6

9. Cook J. Global optical-model potentials for the elastic scattering of ^6,7Li projectiles. Nucl. Phys. A 388 (1982) 153. https://doi.org/10.1016/0375-9474(82)90513-9