The 12C(18O,α)26Mg and 12C(18O,8Be)22Ne reaction

Excitation functions for α-emission leading to the ground and first excited states of 26Mg and 8Be emission leading to the ground and first and second excited states of 22Ne have been measured at several forward angles for E(c.m) = 15 to 22.4 MeV. There is little evidence for correlated structure. The angular distribution at 16.5 MeV for the α + 26Mg(g.s.) channel is rather structureless while that for the 8Be + 22Ne(g.s.) channel appears to be dominated by a J = 13 contribution. Statistical model calculations indicate that much of the yield for both the α and 8Be exit channel is compound nuclear in origin, with some indication of a larger direct contribution for the 8Be channel at the lower end of the bombarding energy range. (orig.)