Abstract
A systematic analysis of \ensuremath{\alpha}($^{4}\mathrm{He}$)-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.
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