Examination of the O-16+Si-28 system with microscopic and phenomenological potentials


Kocak G., Karakoc M., Boztosun I.

PHYSICS OF ATOMIC NUCLEI, cilt.70, sa.2, ss.290-299, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 70 Sayı: 2
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1134/s106377880702010x
  • Dergi Adı: PHYSICS OF ATOMIC NUCLEI
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.290-299
  • Akdeniz Üniversitesi Adresli: Hayır

Özet

The O-16 + Si-28 reaction has been widely studied both experimentally and theoretically and has been claimed to show indications of chaotic scattering. In order to examine this claim and to address whether reaction models such as the optical one could explain the experimental data, we have analyzed the O-16 + Si-28 system within the framework of the optical model for ten energies from 29.0 to 45.0 MeV, by using microscopic folded potentials, which are based on M3Y nucleon-nucleon, alpha-alpha effective interactions and a phenomenological shallow potential. All potentials describe the individual angular distributions very well at forward angles. However, they fail to describe the individual angular distributions over the whole angular range up to 180 degrees. Nevertheless, we have been able to explain the experimental data by modifying the surface region of the microscopic real potentials by adding two surface potentials. With these correction potentials, we have obtained very good agreement for the individual angular distributions over the whole angular range for the given energies as well as for the experimental data near the Coulomb barrier. The failure of these optical potentials in explaining the scattering observables of this reaction without corrections puts a question mark on the model and supports the idea of a chaotic behavior.