A systematic analysis of α(${}^4\mathrm{He}$)-nucleus elastic scattering is made by using a microscopic optical model potential obtained by the double folding of the complex nucleon-nucleon ($\mathit{NN}$) effective interaction based on the $G$-matrix theory. We adopt the so-called JLM interaction as the complex $\mathit{NN}$ interaction and test its applicability to the ${}^4\mathrm{He}$ elastic scattering by ${}^{12}\mathrm{C}$, ${}^{16}\mathrm{O}$, ${}^{28}\mathrm{Si}$, and ${}^{40}\mathrm{Ca}$ over a wide range of incident energy and scattering angle. The experimental cross sections for incident energies ranging from $E_{\mathrm{lab}}=40$ to 240 MeV are well reproduced by the double folding potential up to backward angles. Although modification of the real and imaginary potential strength by about 25% and 35%, respectively, on average is necessary to reproduce the data, the renormalization factors are found to be almost constant with respect to the incident energy and target mass number.

• Received 27 March 2006

DOI:https://doi.org/10.1103/PhysRevC.74.034606