The Pauli exclusion effect in multiparticle and hole state densities

Neutron time-of-flight spectra were measured in coincidence withγ-rays characteristic for thexn (x=2, 3, 4, 5) fusion-like products in reactions of 35–57 MeVα-particles with¹²⁴Sn. Additional information was obtained from excitation function andγ-multiplicity measurements. The neutron energy spectra for a specificx n channel at high bombarding energies clearly show the presence of nonequilibrium neutron emission. The spectra are parameterized in terms of emission from a slow equilibrated and a fast moving source. The fast moving source has a velocity close to the beam velocity indicating a close relationship between the movement of the projectile and the neutron emission.