DISAPPEARANCE OF FUSION-LIKE RESIDUES AND THE NUCLEAR-EQUATION OF STATE

The cross sections for massive residues from Ca40+40Ca and Ar40+27Al collisions were calculated with an improved Boltzmann-Uehling-Uhlenbeck equation. The calculated residue cross sections decrease with incident energy, an effect which does not appear related to the residue excitation energy. Larger residue cross sections result from calculations with larger in-medium nucleon-nucleon cross sections or with equations of state which are less attractive at subnuclear density. This dual sensitivity may be eliminated by measurements of observables associated with the coincident light particles. © 1990 The American Physical Society.