Double-folding analysis of elastic and inelastic ³He-nucleus scattering at 60 MeV

Abstract This study investigated the elastic and inelastic scattering of 3 He particles from 12 C, 16 O, 24 Mg, and 28 Si nuclei at 60 MeV using a double-folding approach with four newly derived effective nucleon-nucleon (NN) interactions (R3Y(HS), R3Y(L1), R3Y(W), and R3Y(Z)) derived from the relativistic mean-field theory. The four derived effective NN interactions exhibited strong sensitivity to the choice of exchange potential. Regularizing the NN interactions improved the agreement between calculated folded potentials and experimental data. Normalization constants for the R3Y(HS) interaction suggested its superiority over the R3Y(L1) and R3Y(W) interactions within the double-folding framework. Transition potentials based on two models, deformed potential and double folding potential, were used to describe inelastic scattering. Physically consistent deformation parameters were obtained. The deformed potential model yielded better results for 12 C and 16 O, whereas the double folding model performed better for 24 Mg and 28 Si, suggesting that the advantage of the double folding model is limited to lighter targets. The Bohr-Mottelson transition density effectively described 2 + states; however, it was less suitable for the 3 − state of 16 O, for which a Tassie-like transition density provided improved agreement.