Towards an unambiguous determination of the excitation energy of the projectile in heavy-ion reactions ?

The excitation energy of the quasi-projectiles produced in heavy-ion collisions is determined for the Ni+Au reactions at 52 and 90 AMeV. A new method is proposed for isolating unambiguously the particles evaporated by the source. It consists in observing them at small angles along the flight direction of the source.