Abstract
A systematic analysis of alpha(4 He )-nucleus elastic scattering is made by using a microscopic optical model potential obtained by the double folding of a complex nucleon-nucleon (NN) effective interaction based on the G-matrix theory. We adopt the so-called JLM interaction as the complex NN interaction and test its applicability to the 4 He elastic scattering by 12 C , 16 O , 28 Si and 40 Ca . The experimental cross sections for incident energies ranging from E 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, in 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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