Thermal Properties of ${}_{}{}^{54}{}_{}{}^{}Fe$

We study the thermal properties of ${}^{54}\mathrm{Fe}$ with the Brown-Richter interaction in the complete $1p0f$ model space. Monte Carlo calculations show a peak in the heat capacity and rapid increases in both the moment of inertia and $M1\mathrm{}$ strength near a temperature of 1.1 MeV that are associated with the vanishing of proton-proton and neutron-neutron monopole pair correlations; neutron-proton correlations persist to higher temperatures. Our results are consistent with a Fermi gas level density whose backshift vanishes with increasing temperature.