Abstract
Neutron spectra produced by the ($^{3}\mathrm{He},n$) reaction on targets of $^{45}\mathrm{Sc}$, $^{48}\mathrm{Ti}$, $^{49}\mathrm{Ti}$, $^{51}\mathrm{V}$, $^{52}\mathrm{Cr}$, $^{56}\mathrm{Fe}$, $^{58}\mathrm{Fe}$, $^{59}\mathrm{Co}$, and $^{60}\mathrm{Ni}$ have been obtained for bombarding energies of 10.5 and 15 MeV. Peaks were observed in the forward-angle spectra but disappear for angles larger than 30\ifmmode^\circ\else\textdegree\fi{}, leaving a structureless continuum. Examination of the energy dependence in the region corresponding to residual excitations of between 3 and 8 MeV shows better agreement with the calculation assuming a knockout reaction mechanism than that assuming a stripping reaction, although the peaks seen in the forward-angle spectra correspond to stripping reactions. The Griffin formula for calculating densities of particle-hole states is compared with values obtained from combinations of a specific single-particle level scheme; good agreement is found.
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