We report measurements for in-plane and out-of-plane correlations for p,d,t${,}^3$He, and ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ from 40 MeV/nucleon C+C. Silicon-NaI light particle telescopes were placed at (theta,φ)=(45°,90°) and (45°,180°) and another telescope was moved from theta=25° to 120° at φ=0°. No peak was observed in the ratio of in- to out-of-plane proton-proton correlations at energies corresponding to quasi-elastic scattering. The angular distributions of the ratio of in- to out-of-plane for p-p, d-d, t-t, ${}_{}{}^3{}_{}{}^{}\mathrm{-}_{}^3{}_{}{}^{}$He, and ${}_{}{}^4{}_{}{}^{}\mathrm{-}_{}^4{}_{}{}^{}$He peak around 35° and the maximum value increases monotonically with mass of the particles reaching a value near 4 for ${}_{}{}^4{}_{}{}^{}\mathrm{-}_{}^4{}_{}{}^{}$He. A calculation incorporating simple kinematic effects cannot reproduce the observed correlations for any of the paritcle pairs.

• Received 15 August 1985

DOI:https://doi.org/10.1103/PhysRevC.33.1540