Measurement of light particle-complex fragment coincidence cross sections

Light particle (Z less than or equal to 2) inclusive and coincidence spectra have been measured for the reactions 92 MeV/A 40Ar + Au and 30 MeV/A 12C + Al,Au at angles from 45 to 900. Coincidence triggers for the light particle spectra were intermediate mass fragments (3 less than or equal to Z less than or equal to 7) at -30 degrees, near projectile velocity fragments (3 less than or equal to Z less than or equal to 18) at -13 degrees, and light particles (Z less than or equal to 2) at -45 and -90 degrees. The Ar + Au inclusive spectra are compared to hydrodynamics and firestreak model calculations. A coalescence model calculation is used to extract coalescence radii for d,t, 3He, and 4He from the Ar + Au spectra. Triple differential cross sections predicted by hydrodynamics are compared to the intermediate mass fragment triggered light particle spectra. A single moving source parameterization is employed throughout to depict the relevant trends in the data. Simple conservation laws are considered for the coincidence spectra in the context of a thermal moving source