Abstract
The back-angle yields of the oxygen and carbon particles from the /sup 24/Mg+/sup 16/O reaction have been measured at E/sub Lab/(/sup 24/Mg) = 79.5 MeV by using reverse kinematics. Comparison with data for the /sup 28/Si+/sup 12/C reaction forming the same compound nucleus at the same excitation energy and with very similar spin distribution, demonstrates a strong entrance channel effect which is favoring the break-up into the entrance channel with large excitation energy. This result qualitatively supports the picture of the formation of a long-lived orbiting complex whose structure and decay are dependent on the entrance channel. The compound nucleus contribution has been inferred to be less than 15% of the measured oxygen cross-section. 9 references.
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