Refractive scattering and reactions, comparison of two systems:16O+16O and20Ne+12C

Abstract

Abstract. Elastic, inelastic scattering as well as one-neutron transfer channels have been measured over a wide angular range for systems 160+ 160 at the incident energy of 350 MeV and 2~at 390 MeV, respectively, using the Q3D magnetic spectrometer. In both cases differential cross sections have been measured down to about 50 nb/sr (or da/daR <_ 10 -4) at large angles. For the 160 + 160 system refractive contributions are found at the level of these cross sections, whereas in the ZONe + l zc case a steeper decrease of the differential cross section with the angle is observed and the refractive contribution can not be determined. The elastic scattering data have been analyzed using standard Woods-Saxon potentials and potentials calculated in different versions of the doublefolding model. Some properties of these potentials are tested in the calculations for inelastic scattering and oneneutron transfer within the DWBA. With the refractive pattern observed for the 160 "4-160 system, the scattering and transfer data are found to be sensitive to the interaction potential at small internuclear distances down to about 2.5 fm.

Effect of repulsive and attractive three-body forces on nucleus-nucleus elastic scattering

“…Lower: cross sections calculated with the real part of the FMP and the phenomenological imaginary potential. The experimental data are from Refs [38,39]…”

Nuclear rainbow scattering and nucleus–nucleus potential

“…[14,15] at E lab = 350 MeV in comparison with OM description using the real folded potential and WS imaginary potential [24], and different cutoffs for the lowest partial wave L min ; the corresponding impact parameters are R min . The observed minimum at Θ ≈ 44…”

Unification of Airy structure in inelasticα+16O scattering andα-cluster structure with core excitation in20Hirabayashi1, Ohkubo2 2013Phys. Rev. C211240View full textAdd to dashboardCite

“…In the calculations the strength parameter of the imaginary potential (W V ) was fitted to reproduce the magnitude of the experimental cross sections while the radius parameter and the diffuseness parameter were fixed at around R V = 5 fm and a V = 0.3-0.5 fm, respectively. These approaches using the folding potential have been shown successful for the α and 3 He scattering from 12 C [16,17,19] over a wide rage of incident energies. The properties of the real folding potential and potential parameters used in the analysis are given in Table I.…”

“…On the other hand, from the viewpoint of a nuclear structure study it has recently been shown that inelastic nuclear rainbow scattering is powerful in understanding the α-cluster structure of the excited states of the nucleus. For example, the α particle condensate states in 12 C and 16 O have been revealed by studying the rainbow and prerainbow in α particle and 3 He scattering from 12 C [16][17][18][19]. However, a unified study of inelastic rainbow scattering and α-cluster structure has never been undertaken for the typical α + 16 O system.…”