Oscillatory structure appears in 28Si(16O, 12C) excitation functions populating the ground state and first excited state of 32S over a range of center-of-mass bombarding energy from 22.3 MeV to 32.5 MeV. This structure is weaker in magnitude and less regular than that previously reported for 24Mg(16O, 12C) excitation functions. The structure in the 28Si → 32S ground state excitation function does not correlate with entrance or exit channel elastic scattering excitation functions, but it does correlate with some of the structure observed in excitation functions for 28Si(16O, 16O)28Si*(2+). At most bombarding energies the 28Si → 32S ground state transition shows angular distributions which are dominated by one grazing partial wave (which can be calculated with the sample semiclassical Frahn-Venter model), but in two narrow energy ranges the angular distributions shift abruptly to oscillatory shapes which are not dominated by the grazing partial wave.
ASJC Scopus subject areas
- Nuclear and High Energy Physics