Temperature of Dy Nuclei Excited to 40-150 MeV

From the systematics of cross sections and neutron energies for ($\mathrm{HI},xn$) reactions, the average energy of the first emitted neutron has been obtained. These average energies reflect the nuclear temperature or level-density parameter. Average photon energies are also obtained and compared to calculated values of the lowest-lying levels for each spin. Reactions are considered which involve the emission of 3-11 neutrons from compound systems of 40-150 MeV and average spin 15-80. New experimental data are presented for the reactions ${\mathrm{Nd}}^{148}({\mathrm{C}}^{12},5n){\mathrm{Dy}}^{155}$, ${\mathrm{Nd}}^{150}({\mathrm{C}}^{12},5n){\mathrm{Dy}}^{157}$, and ${\mathrm{Nd}}^{150}({\mathrm{C}}^{12},7n){\mathrm{Dy}}^{155}$.