(α,αp) quasifree proton knockout reaction onH2,Li6, andF19

The ($\alpha$,$\alpha p$) reaction on ${}_{}{}^2{}_{}{}^{}\mathrm{H}$, ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, and ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}$ has been studied with 140 MeV $\alpha$ particles. Energy spectra for the ground state transition are presented at one angle pair for ${}_{}{}^2{}_{}{}^{}\mathrm{H}$ and ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}$, and three angle pairs for ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$. Distorted-wave impulse-approximation calculations provide good fits to the ${}_{}{}^2{}_{}{}^{}\mathrm{H}$ data, the ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}$ data, and data at one angle pair for ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$. The other two angle pairs for ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ show significant deviations from the distorted-wave impulse-approximation suggesting contributions from processes more complicated than those included in the distorted-wave impulse-approximation.