Abstract
Detailed large-angle angular distributions have been measured for 28Si( 32S, 32S) 28Si and 28Si( 32S, 36Ar) 24Mg reactions from E c.m. = 42.0 to 48.1 MeV in steps of 0.23 MeV. Excitation functions of cross sections for 6 groups display very weak structure of intermediate width. A comprehensive analysis revealed no statistically significant deviations in the excitation functions, which, however, display considerable levels of correlation suggestive of strong coupling. No intermediate-width resonances were found. Results of optical-model calculations suggest that the elastic scattering angular distributions may be strongly influenced by the 4He transfer mechanism which may also be responsible for the wide window for L = 18 observed in the elastic data.
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