New results in the analysis of16O+28Sielastic scattering by modifying the optical potential

Abstract

The elastic scattering of the 16 O+ 28 Si system has been analyzed with a modified potential within the framework of the optical model over a wide energy range in the laboratory system from 29.0 to 142.5 MeV. This system has been extensively studied over the years and a number of serious problems has remained unsolved: The explanation of the anomalous large angle scattering data; the out-of-phase problem between theoretical predictions and experimental data; the reproduction of the oscillatory structure near the Coulomb barrier; the consistent description of angular distributions together with the excitation functions data are just some of these problems. We propose the use of a modified potential method to explain these problems over this wide energy range. This new method consistently improves the agreement with the experimental data and achieves a major improvement on all the previous Optical model calculations for this system.

ElasticO16+Ne20scattering from a folding model analysis

“…Analyses for the 16 O+ 12 C and 16 O+ 16 O systems [11,12,23] have shown that for the data at higher energies an acceptable description was possible using just a volume term for the imaginary part, whereas the fits at lower energies (lower than [24], for analysis of the 16 O+ 28 Si system using a deep modified optical potential with an imaginary potential consisting of the sum of a Woods-Saxon volume and a surface potential, it was observed that the surface term had a significant effect at all the energies considered. As in the present investigation for elastic 16 O+ 20 Ne scattering, the energy range is E c.m.…”

“…In Ref. [24], the radius parameter found for the volume imaginary term is R W = 0.060 84E c.m. − 0.544 fm, which is much smaller than that generally used for lower energies.…”

“…− 0.544 fm, which is much smaller than that generally used for lower energies. In our calculations, referring to the above works [11,12,23,24] and after several attempts, the parameters r W = 0.24 fm, a W = 0.10 fm, r D = 1.08 fm, and a D = 0.60 fm were chosen and fixed in the whole considered energy range; only N , W 0 , and W D were allowed to vary to obtain a fit to the experimental data. The calculated results are shown in Fig.…”

Influence of long-range effects on low-energy cross sections of He and HeX: The lithium problem

“…With this aim, we added a small potential to modify the shape of the nuclear potential in the surface region [25][26][27]. We found that the tail of the real potential has a significant effect on the cross section.…”

Generalized Nuclear Woods-Saxon Potential under Relativistic Spin Symmetry Limit

“…The Coulomb plus WoodsSaxon potentials are well known as modified Woods-Saxon potential that plays a great role in nuclear physics. Fusion barriers for a large number of fusion reactions from light to heavy systems can be described well with this potential [37][38][39][40]. But the modified Woods-Saxon potential has no exact or approximate solutions.…”