Phase Shift Analysis of 386 MeV Alpha Particle Elastic Scattering on Tin Isotopes

다국어 초록 (Multilingual Abstract)

A phase shift analysis of the elastic scattering angular distributions for α + 112,120,124Sn systems at 386 MeV is performed using the McIntyre parametrized phase shift model. The calculated results not only reproduced well the structure of measured angular distribution of three scattering systems, but also showed very good agreements with the experimental data. Average of input parameter values extracted from the best fit to each α + 112,120,124Sn elastic data also provided a fairly well reproduction of experimental results. The oscillatory structure of angular distributions observed near the crossing angle is explained in terms of the strong interference between the near-side and the far-side scattering amplitudes. The behaviors of elastic cross section in the region of relatively large angles are mainly governed by the far-side contribution. As the target mass number increases, the magnitude of strong absorption radius, reaction cross section and nuclear rainbow angle tended to increase slightly.