Light-particle-complex-fragment coincidence cross sections from intermediate energy nucleus-nucleus collisions

Light-particle (Z<eq2) inclusive and coincidence spectra have been measured for the reactions 30 MeV/nucleon ${}_{}{}^{12}{}_{}{}^{}$C+Al and ${}_{}{}^{12}{}_{}{}^{}$C+Au and 92 MeV/nucleon ${}_{}{}^{40}{}_{}{}^{}$Ar+Au at angles from 45° to 90°. Coincidence triggers for the light-particle spectra were intermediate rapidity fragments (3<eqZ<eq7) at -30° and projectilelike fragments (3<eqZ<eq18) at -13°. The Ar + Au inclusive spectra are compared to hydrodynamics and firestreak model calculations. Nonazimuthally averaged hydrodynamics calculations are compared to the light-particle spectra triggered by projectilelike fragments. A single moving source parametrization is employed throughout to extract the relevant trends in the inclusive and coincidence data. The coincidence spectra are compared with a model based on the moving source model but incorporating momentum conservation to account for kinematical biases. Little difference between inclusive and complex-fragment-triggered coincidence cross sections is observed, indicating that all the fragments have a common source.