Inelastic scattering of protons from^6,8He and^7,11Li in a folding model approach

Abstract

The proton-inelastic scattering from 6,8 He and 7,11 Li nuclei are studied in a folding model approach. A finite-range, momentum, density and isospin dependent nucleon-nucleon interaction (SBM) is folded with realistic density distributions of the above nuclei. The renormalization factors N R and N I on the real and volume imaginary part of the folded potentials are obtained by analyzing the respective elastic scattering data and kept unaltered for the inelastic analysis at the same energy. The form factors are generated by taking derivatives of the folded potentials and therefore required renormalizations. The β values are extracted by fitting the p + 6,8 He, 7,11 Li inelastic angular distributions. The present analysis of p + 8 He inelastic scattering to the 3.57 MeV excited state, including unpublished forward angle data (RIKEN) confirms L = 2 transition. Similar analysis of the p + 6 He inelastic scattering angular distribution leading to the 1.8 MeV (L = 2) excited state fails to satisfactorily reproduce the data.

Folding model analysis of proton scattering from mirror nuclei 18Ne and 18O

“…The values of parameters n, C l , C u , a, b, d are given in Table 1. These constants are found to reproduce the bulk properties of nuclear matter and of finite nuclei [11,12] and are known also to explain the p + 4,6,8 He, 6,7,9,11 Li scattering data successfully [2,4,[13][14][15][16]. The parameters are determined without exchange effects and thus they contain the effect indirectly though in a very approximate way.…”

Folding model analysis of proton scattering from nuclei

“…In addition, there is opportunity to track neutron and proton contributions of the 2 + state as the neutron drip line is approached [4]. Proton scattering is widely used as a means to study both macroscopic and microscopic aspects of nuclear structure [5,6,7,8]. A suitable realistic effective nucleon-nucleon (NN) interaction is also needed in the analysis [6].…”

“…The earlier p- 18 O differential cross section and analyzing powers for the ground state and 2 + 1 level at 24.5A MeV incident energy [10] are also included in the analysis. The folding model, which relates the density profile of the nucleus with the scattering cross sections is powerful tool for analyzing nucleus-nucleus scattering data at a few tens of MeV/nucleon [3,6,7,8,9,10,11,12,13]. Thus it is very appropriate for studying nuclei with extended density distributions.…”

FOLDING MODEL ANALYSIS OF 6He + 12C ELASTIC SCATTERING

“…We have several choices to study the effect caused by the halo structure of 6 He. 15,24,25 Five various versions of the ground state density distribution are introduced in the present calculations.…”