Structure is observed in the yield curve for the 871-keV $\gamma$ rays of ${}_{}{}^{17}{}_{}{}^{}\mathrm{O}$ from the ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$ + ${}_{}{}^{17}{}_{}{}^{}\mathrm{O}$ reaction but absent for other observable transitions. The single-particle nature of the ${}_{}{}^{17}{}_{}{}^{}\mathrm{O}$ transition suggests an interpretation in terms of the nuclear Landau-Zener effect.

NUCLEAR REACTIONS ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$ + ${}_{}{}^{17}{}_{}{}^{}\mathrm{O}$, $E_{\mathrm{c}.\mathrm{m}.\mathrm{}}=15-26\mathrm{}$ MeV, Ge(Li) detectors, measured $I_{\gamma }\mathrm{}\left(E\right)\mathrm{}$.

• Received 22 March 1983

DOI:https://doi.org/10.1103/PhysRevC.28.437