COMPETING REACTION-MECHANISMS FOR THE O-16, O-17, O-18-10, B-11 AND F-19+BE-9 SYSTEMS(B)

Fusion, strongly damped, quasielastic and elastic scattering yields ha ve been measured for the O-16, O-17, O-18+B-10, B-11 systems at 1 MeV less-than-or-equal-to E/A less-than-or-equal-to 4 MeV and F-19+Be-9 at 56 MeV. The significant yields observed for the strongly energy-dampe d products are attributed to a fusion-fission process. This identifica tion is supported by statistical model calculations based on the trans ition-state model of fission. The elastic scattering data present enha nced back-angle yields which can be understood in terms of a compound elastic process. These results help to further establish the reaction systematics in this mass region.