Correlation functions and emission time sequence of light charged   particles from projectile-like fragment source in E/A = 44 and 77 MeV 40Ar +   27Al collisions
  Two-particle correlation functions, involving protons, deuterons, tritons, and alpha-particles, have been measured at very forward angles (0.7 deg < theta_lab < 7 deg), in order to study projectile-like fragment (PLF) emission in E/A = 44 and 77 MeV 40Ar + 27Al collisions. Peaks, originating from resonance decays, are larger at E/A = 44 than at 77 MeV. This reflects the larger relative importance of independently emitted light particles, as compared to two-particle decay from unstable fragments, at the higher beam energy. The time sequence of the light charged particles, emitted from the PLF, has been deduced from particle-velocity-gated correlation functions (discarding the contribution from resonance decays). Alpha-particles are found to have an average emission time shorter than protons but longer than tritons and deuterons. 
R. Ghetti, J. Helgesson, G. Lanzano', E. De Filippo, M. Geraci, S.   Aiello, S. Cavallaro, A. Pagano, G. Politi, J. L. Charv...