Neutrons in coincidence with intermediate mass fragments at large angles from 14N + Ag reactions at 20 and 35 MeV/nucleon

The spectral shape and multiplicity of neutrons from the reaction of 14N + Ag at E/A = 20 and 35 MeV have been measured for neutrons in coincidence with intermediate mass nuclei emitted at 50, 70 and 900. The spectral shape clearly suggests two moving sources. The slower source velocity is about 65% of the center of mass velocity for E/A = 35 MeV and 80% of the center of mass velocity for E/A = 20 MeV (7% and 9% of the beam velocity, respectively). The faster source velocity is slightly less than half of the beam velocity for each case. Knowledge of the neutron multiplicity is necessary for models which attempts to explain the low effective temperature which has been determined from recent measurements of excited state populations. The data are also compared to the Harp-Miller-Bern exciton model. In addition, the neutron decay of excited states of 7Li, 8Li, 10Be, 11Be, and 12B has been investigated in the same reactions. The production of these excited states is compared to that of the ground state and other states of lower excitation energy for each isotope investigated