The strength of the neutron-neutron correlation function from the $E=45\mathrm{}\mathit{A}\mathrm{MeV}{\hspace{0.5em}}^{58}\mathrm{Ni}{+}^{27}\mathrm{Al},$ ${}^{\mathrm{nat}}\mathrm{Ni},$ and ${}^{197}\mathrm{Au}$ reactions depends on the neutron parallel velocity. This indicates the presence of multiple sources of neutron emission. We find these sources consistent with a dissipative, binary reaction mechanism as it is described by, e.g., Boltzmann-Uehling-Uhlenbeck calculations.

• Received 19 January 2001

DOI:https://doi.org/10.1103/PhysRevC.64.017602