Energy and angular distributions of neutrons, protons, and alpha particles were measured in coincidence with the projectilelike fragment in deep inelastic collisions of ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ on ${}_{}{}^{40,44,48}{}_{}{}^{}\mathrm{Ca}$ at 102 and 142 MeV. Using an event-by-event analysis which takes into account particle emission from both fragments and the recoil correction due to light particle emission, we show that our data are consistent with the assumption that the light particles are evaporated in the rest frame of the fully accelerated projectilelike and targetlike fragments. This conclusion is based on the results for neutrons and alpha particles. But because of kinematic limitations which affect the alpha particle data, the conclusions based on the latter are less definitive.

NUCLEAR REACTIONS ${}_{}{}^{40,44,48}{}_{}{}^{}\mathrm{Ca}({}_{}{}^{16}{}_{}{}^{}\mathrm{O}, X)$, $E=102, 142$ MeV, measured n, p, $\alpha$ in coincidence with projectilelike fragment; deduced c.m. energy spectra and multiplicities of the light particles. Results consistent with evaporation from the heavy fragments.

• Received 4 October 1982

DOI:https://doi.org/10.1103/PhysRevC.28.1538