CLASSICAL AND QUANTUM APPROACH TO LIGHT-PARTICLE CORRELATIONS IN INTERMEDIATE-ENERGY HEAVY-ION REACTIONS

We present classical and quantum approaches to light-particle correlat ions. The calculations are compared with p-p and p-d correlation funct ions measured at backward angles in the reaction Ar-40+Ag-108 at 44 Me V/nucleon. The predictions of both classical and quantum models are fo und to be in good agreement with experimental data. The extracted valu es of the mean time delay between emissions of two particles are(2.0+/ -0.5)X10(-21) s for p-p and (3.5+/-1.5)X10(-21)s for p-d pairs. The di fferences between the two approaches became signicant for emission tim e scales shorter than 10(-21)s. In this case the classical model predi cts a noticeable influence of the Coulomb field of the emitter on the p-d correlation function. On the other hand, the quantum calculation s hows an increasing importance of the two-particle nuclear interaction.