The reaction ${}_{}{}^{14}{}_{}{}^{}\mathrm{C}({}_{}{}^6{}_{}{}^{}\mathrm{Li},d){}_{}{}^{18}{}_{}{}^{}\mathrm{O}$ is studied at 34 MeV ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ incident energy in the $5^{\circ }\le {\theta }_{\mathrm{lab}}\le {45}^{\circ }$ angular range in steps of 5°. Angular distributions are analyzed in terms of Hauser-Feshbach and exact finite range distorted-wave Born-approximation theories. The direct $\alpha$-transfer cross sections are evaluated in both the hypotheses of transfer to pure and mixed configurations. In the mixed configurations case good agreement between experimental and theoretical cross sections is found by using the empirical wave functions of Lawson, Serduke, and Fortune. Alpha-spectroscopic strengths are extracted for ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}$ states lying below 17.0 MeV excitation energy. Spins and parities are suggested for the 7.84, 8.9, 12.04, 14.6, and 17.0 MeV ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}$ levels. The existence and the structure of a positive-parity ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}$ rotational band is investigated.

[NUCLEAR REACTIONS ${}_{}{}^{14}{}_{}{}^{}\mathrm{C}({}_{}{}^6{}_{}{}^{}\mathrm{Li},d){}_{}{}^{18}{}_{}{}^{}\mathrm{O}$ $E=34\mathrm{}$ MeV; measured $\sigma \left(\theta \right)$; ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}$ levels deduced $J^{\pi }$ and $S_{\alpha }$. HF and EFR-DWBA analysis. EFR-DWBA analysis using empirical wave functions.]

• Received 25 November 1980

DOI:https://doi.org/10.1103/PhysRevC.24.476