Thermal Response of Light Nuclei with a Realistic Effective Hamiltonian

A realistic microscopic effective Hamiltonian ($H_{\mathrm{eff}}$) is employed with the spherical finite-temperature Hartree-Fock approximation to evaluate the thermodynamic properties of ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ and ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$. We scale $H_{\mathrm{eff}}$ to accommodate the $A$-dependent effects. We then adjust the Hamiltonian slightly to reproduce appropriate ground-state properties in the Hartree-Fock approximation. We find the thermal response of these nuclei to be substantially greater than that obtained with zero-range phenomenological forces.