Single-particle state assignments in ${}^{251}\mathrm{Cf}$ and ${}^{249}\mathrm{Cm}$ at $~1$ MeV excitation have been deduced from cross sections previously measured for the ${}^{250}\mathrm{Cf}(d,p){}^{251}\mathrm{Cf}$ and ${}^{248}\mathrm{Cm}({}^4\mathrm{He},{}^3\mathrm{He}){}^{249}\mathrm{Cm}$ reactions. The assignments are supported by observed cross-section signatures and intraband level spacings. The observed energies of these single-particle states, after pairing effects are removed, are in good agreement with values calculated using a Woods-Saxon single-particle potential. Neutron level diagrams, showing level spacings as a function of ${\nu }_2,{\nu }_4,$ and ${\nu }_6$, are extended to include neutron orbitals above $N=164$.

• Received 9 November 2009

DOI:https://doi.org/10.1103/PhysRevC.80.064315