Non-coplanar (p, pα) and (p, dHe3) reactions onBe9at 101.5 MeV

The ($p, p\alpha$) and ($p, d{}_{}{}^3{}_{}{}^{}\mathrm{He}$) reactions on ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$ have been investigated at a bombarding energy of 101.5 MeV in a non-coplanar geometry. Coincident data were obtained for coplanar angles ${\theta }_{p,d}=81.2\mathrm{}°$ and ${\theta }_{\alpha ,{}_{}{}^3{}_{}{}^{}\mathrm{He}}=-41.0\mathrm{}°$, and the $\alpha \left({}_{}{}^3{}_{}{}^{}\mathrm{He}\right)$ detector ranging from $\beta =0\mathrm{}° \mathrm{to} 20°$ out of the plane. These data show a smooth reduction in cross section with increasing $\beta$. Comparisons with distorted-wave impulse approximation calculations show that the reactions are dominated by quasifree processes, and that the $D$-state component of the ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$ wave function dominates for large $\beta$. Absolute spectroscopic factors for the $S$- and $D$-state terms extracted from the two different reactions are consistent and in excellent agreement with theoretical predictions.