THE APPLICATION OF THE MODIFIED GLAUBER MODEL II FOR THE DESCRIPTION PROTON-NUCLEUS SCATTERING: EFFECT OF RELATIVISTIC AND NON-RELATIVISTIC OPTICAL POTENTIALS

Calculations of total reaction cross-sections and differential cross-sections using the modified Glauber model II for p –16 O scattering in the energy range 100–497.5 MeV are compared with experimental data. The real parts of the nuclear central potential and spin-orbit potential were used to calculate the modified Glauber model II. The nuclear potential was constructed using two approaches: the Dirac-equation-based optical potential and the non-relativistic treatment. The phenomenological and analytical methods are used to calculate these two approaches. The strength of the real parts of central and spin-orbit potentials are normalized to the best fit to the data. The best values were obtained close to unity. Most of the calculations derived from the Dirac-equation-based optical potentials were more comparable with the experimental data than the non-relativistic calculations. This may be attributed to the delicate cancellation between the short-range repulsive and the long-range attractive contributions. The present investigation indicated that a good choice of the potential at given energy offers a reliable determination of the impact parameter estimated according to the modified Glauber model II.