Effective finite temperature mean field approximations in finite systems

R. ROSSIGNOLI; N. CANOSA; P. RING

NUCLEAR PHYSICS A

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 1995 vol. 591 p. 15 - 40

0375-9474

A symmetrized microscopic mean field approximation for finite systems at finite temperature, which takes into account reorientation effects in symmetry-breaking phases, is derived. We also examine an effective mean field approximation obtained from the static path approximation and its relation with the previous approach. The methods are applied to a standard pairing interaction, where results, obtained both in an solvable model and in a heavy nucleus, indicate the subsistence of significant superconducting effects for T > T_c.