Proton Emission Times in Spectator Fragmentation

Proton-proton correlations from spectator decays following ¹⁹⁷ Au+¹⁹⁷Au collisions at 1000 AMeV have been measured with an highly efficient detector hodoscope. The constructed correlation functions indicate a moderate expansion and low breakup densities similar to assumptions made in statistical multifragmentation models. In agreement with a volume breakup rather short time scales were deduced employing directional cuts in proton-proton correlations.