The study of ${}_{}{}^3{}_{}{}^{}\mathrm{H}$ + ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ reactions at $E_{{}_{}{}^3{}_{}{}^{}\mathrm{He}}=50\mathrm{}$ MeV, ${}_{}{}^3{}_{}{}^{}\mathrm{H}$ + ${}_{}{}^2{}_{}{}^{}\mathrm{H}$ reactions at $E_d=35\mathrm{}$ MeV, as well as the reanalysis of ${}_{}{}^2{}_{}{}^{}\mathrm{H}({}_{}{}^3{}_{}{}^{}\mathrm{He},pt)p$ reaction demonstrates that the quasifree reaction mechanism plays an important role. Evidence for the quasifree reaction mechanism is found in the processes ${}_{}{}^3{}_{}{}^{}\mathrm{H}({}_{}{}^3{}_{}{}^{}\mathrm{He},dd)d$, ${}_{}{}^3{}_{}{}^{}\mathrm{H}({}_{}{}^3{}_{}{}^{}\mathrm{He},pt)d$, ${}_{}{}^3{}_{}{}^{}\mathrm{H}({}_{}{}^3{}_{}{}^{}\mathrm{He},dt)p$, ${}_{}{}^3{}_{}{}^{}\mathrm{H}({}_{}{}^3{}_{}{}^{}\mathrm{He},p\alpha )n$, ${}_{}{}^2{}_{}{}^{}\mathrm{H}({}_{}{}^3{}_{}{}^{}\mathrm{He},pt)p$, and ${}_{}{}^3{}_{}{}^{}\mathrm{H}({}_{}{}^2{}_{}{}^{}\mathrm{H},pt)n$. Evidence for $d-d$, $p-{}_{}{}^3{}_{}{}^{}\mathrm{He}$, $d-{}_{}{}^3{}_{}{}^{}\mathrm{He}$, and $p-t$ quasifree scattering is found in the processes ${}_{}{}^3{}_{}{}^{}\mathrm{H}({}_{}{}^2{}_{}{}^{}\mathrm{H},dd)n$, ${}_{}{}^3{}_{}{}^{}\mathrm{H}({}_{}{}^3{}_{}{}^{}\mathrm{He},p{}_{}{}^3{}_{}{}^{}\mathrm{He})2n$, ${}_{}{}^3{}_{}{}^{}\mathrm{H}({}_{}{}^3{}_{}{}^{}\mathrm{He},d{}_{}{}^3{}_{}{}^{}\mathrm{He})n$, and ${}_{}{}^3{}_{}{}^{}\mathrm{H}({}_{}{}^2{}_{}{}^{}\mathrm{H},pt)n$, respectively. Comparing the absolute cross sections of these reactions, one concludes that though the shapes of the correlation spectra indicate the significance of quasifree reaction mechanisms, the pole diagram is not dominant.

• Received 28 August 1972

DOI:https://doi.org/10.1103/PhysRevC.8.444