Abstract
The temperature dependence of the self-energy of a particle is studied in semiinfinite nuclear matter. Based on the finite temperature Green's function Matsubara formalism and applying it to the single particle-states in 208Pb, the calculated results show that the characteristic enhancement of the effective mass at near the Fermi energy disappears at temperature T=3 MeV, and correspondingly, as a consequence the level-density parameter should decrease in agreement with recent empirical data.
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