Abstract
Thirty-two angular distributions of the F 19(p, α 0)O 16 reaction over a 23 MeV range were analysed using a plane-wave direct reaction theory incorporating pick-up and exchange pick-up (or heavy-particle stripping) coherently mixed (PWBAE theory). The results of this analysis indicate that the reaction proceeds predominantly by a direct reaction mechanism, but that compound nucleus contributions cannot be ignored at certain energies. Only partial success in obtaining a fit to the extreme backward peak at 11 000 MeV proton bombarding energy, plus the fact that the poorest fits are obtained for other angular distributions with large backward peaking, indicate that other mechanisms than first-order exchange effects are possibly contributing to the backward peaking observed.
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