Inelastic Scattering of 2.6-Mev Neutrons fromFe54,Fe56, andFe57

Gamma rays following inelastic scattering of 2.6-Mev $d-d$ neutrons from isotopically enriched samples of ${\mathrm{Fe}}^{54}$, ${\mathrm{Fe}}^{57}$, and from normal iron have been observed in a NaI scintillation spectrometer using the ${\mathrm{He}}^3$ coincidence technique. The observed gamma rays are listed and are assigned to particular isotopes of the elements studied. Decay schemes are proposed for ${\mathrm{Fe}}^{54}$, ${\mathrm{Fe}}^{56}$, and ${\mathrm{Fe}}^{57}$.