Comparison of Vector Analyzing Powers in (d, d) with Those in (d,He3) and (d, t)l=0Transfer Reactions

Vector-analyzing-power angular distributions for deuteron elastic scattering and $l=0\mathrm{}$ pickup reactions on the same target are compared for ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}(d, d){}_{}{}^{32}{}_{}{}^{}\mathrm{S}$ with ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}(d, {}_{}{}^3{}_{}{}^{}\mathrm{He}){}_{}{}^{31}{}_{}{}^{}\mathrm{P}$, ${}_{}{}^{30}{}_{}{}^{}\mathrm{Si}(d, d){}_{}{}^{30}{}_{}{}^{}\mathrm{Si}$ with ${}_{}{}^{30}{}_{}{}^{}\mathrm{Si}(d, t){}_{}{}^{29}{}_{}{}^{}\mathrm{Si}$, and ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}(d, d){}_{}{}^{14}{}_{}{}^{}\mathrm{N}$ with ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}(d, t){}_{}{}^{13}{}_{}{}^{}\mathrm{N}$ at a deuteron lab energy of 15 MeV. The strong similarities between the two angular distributions for each target suggest that an alternative to the distorted-wave Born-approximation description of these direct transfer reactions may be appropriate.