For the ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}({}_{}{}^3{}_{}{}^{}\mathrm{He}, d){}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}_{}^{*}{}_{}{}^{}$, reaction we have studied the interplay between the one-step and multistep processes within the coupled-channel Born approximation. The data allow a wide variation in the contribution of the onestep $0g$ transfer and only yield an upper limit of 17% of the $0g$ intensity in the $K=\frac{1}{2}$ Nilsson orbital.

NUCLEAR REACTIONS ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}({}_{}{}^3{}_{}{}^{}\mathrm{He}, d){}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}_{}^{*}{}_{}{}^{}\left(4^{+}\right)$, $E=10-23\mathrm{}$ MeV; coupled-channels Born approximation study of interplay between one-step and multistep processes.

• Received 16 June 1980

DOI:https://doi.org/10.1103/PhysRevC.22.2354