Investigation of the differential cross section for elastic scattering of 19.6 Mev protons on separated isotopes

Calculations of three-body observables in8Bbreakup

“…Reducing the strength of the imaginary part of the proton potential in line with a phenomenological study [36], provides agreement with the larger angle data. The full CDCC calculations are shown to provide a good description of the measured 7 Be fragment energy distributions.…”

“…Our calculations show that the 8 B structure and the absorptive content of the protontarget potentials affect the calculated 7 Be fragment angular distributions differently, the former producing an overall scaling, and the latter a large angle enhancement. Reducing the strength of the imaginary part of the proton potential in line with a phenomenological study [36], provides agreement with the larger angle data. The full CDCC calculations are shown to provide a good description of the measured 7 Be fragment energy distributions.…”

“…An alternative global parameterization, tailored for use below 20 MeV, has a similar imaginary strength but somewhat smaller radius and diffuseness parameters r W =1.25 fm, and a W =0.47 fm [35] and leads to very similar results. There are, however, also potential parameters fitted to elastic scattering data at 5.45 MeV [36,34]. This analysis uses a Gaussian surface term and obtains a much reduced absorptive strength, W =3.5 MeV, r W =1.23 fm, and a W =1.2 fm.…”