The ($p, d{}_{}{}^3{}_{}{}^{}\mathrm{He}$) reaction of ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$, and ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ has been investigated in conjunction with studies of the ($p, p\alpha$) reaction on the same targets. Coincident data for all four targets were obtained at a bombarding energy of 100 MeV for numerous angle pairs in order to test the reaction mechanism. Comparisons of the ($p, d{}_{}{}^3{}_{}{}^{}\mathrm{He}$) data to both ($p, p\alpha$) data and distorted-wave impulse approximation calculations indicate a dominance of the direct quasifree reaction process ($p+\alpha \to d+{}_{}{}^3{}_{}{}^{}\mathrm{He}$). The absolute $\alpha$-particle spectroscopic factors extracted using distorted-wave impulse approximation analysis are in agreement with the values obtained in the ($p, p\alpha$) reaction.

NUCLEAR REACTIONS ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$, ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}(p, d{}_{}{}^3{}_{}{}^{}\mathrm{He})$, $E_0=100\mathrm{}$ MeV; measured $\frac{d^3\sigma }{d{\Omega }_{d}d{\Omega }_{{}_{}{}^3{}_{}{}^{}\mathrm{He}}}$ $d{E}_d({\theta }_d, {\theta }_{{}_{}{}^3{}_{}{}^{}\mathrm{He}}, E_d)$; coplanar geometry; DWIA analysis; deduced $\alpha$-particle spectroscopic factors.

• Received 29 November 1976

DOI:https://doi.org/10.1103/PhysRevC.15.1650