Nuclei in the range $3\le Z\le 9$ produced by direct transfer reactions induced by 100 MeV ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}$ ions on ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}$ have been studied between ${\theta }_{\mathrm{lab}}=6\mathrm{}° \mathrm{and} 50°$. Few-nucleon-transfer reactions populating continuum states exhibit a strong quasielastic behavior and can be described by an extension of the diffraction model for inelastic processes. On the other hand, heavier-mass-transfer reactions are damped in energy and present the usual characteristics of deep inelastic collisions.

NUCLEAR REACTIONS ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}$(${}_{}{}^{18}{}_{}{}^{}\mathrm{O}$,$x$), $E_{\mathrm{lab}}=100\mathrm{}$ MeV, measured $\sigma (\theta ,E,Z,A)$ to continuum states, $6°\le {\theta }_{\mathrm{lab}}\le 50°$, $3\le Z\le 9$, $6\le A\le 19$, DWBA and diffraction model analysis.

• Received 6 April 1981

DOI:https://doi.org/10.1103/PhysRevC.24.2148