Nuclear Levels Excited by Inelastic Neutron Scattering

Gamma-ray, neutron, and gamma-gamma coincidence spectra have been obtained from inelastic interactions of 2.48-Mev neutrons with ${\mathrm{P}}^{31}$, ${\mathrm{Mn}}^{55}$, ${\mathrm{Co}}^{59}$, ${\mathrm{As}}^{75}$, ${\mathrm{Nb}}^{93}$, and ${\mathrm{Bi}}^{209}$. The following previously unreported gamma rays have been observed: ${\mathrm{Co}}^{59}$ 2.11±0.05, 0.698±0.015, 0.559±0.022, 0.132±0.010 Mev; ${\mathrm{As}}^{75}$ 1.81±0.04, 1.61±0.04, 1.32±0.04 Mev; ${\mathrm{Nb}}^{93}$ 2.11±0.08, 1.94±0.07, 1.52±0.04, 0.345±0.017 Mev. Evidence has been found for the existence of a 1.56±0.03 Mev level in ${\mathrm{Mn}}^{55}$ and possibly a 1.02±0.05 Mev level in ${\mathrm{As}}^{75}$. The following previously unreported coincidences have been observed: ${\mathrm{Co}}^{59}$ 0.132-2.11 Mev; and ${\mathrm{As}}^{75}$ 0.578-0.136 Mev.