Resumo

CIVITARESE, Osvaldo; HESS, Peter O.  e  HIRSCH, Jorge G.. Low temperature S-shaped heat capacities in finite nuclei. Rev. mex. fis. [online]. 2004, vol.50, n.4, pp.406-411. ISSN 0035-001X.

While in the thermodynamic limit a phase transition is signaled by the presence of a sharp peak in the specific heat, in finite systems a bump is usually found. However, there are relevant cases in which the presence of a low-temperature bump in the canonical specific heat of atomic nuclei is linked to the existence of isolated low energy states through a local Schottky effect, and do not represent a phase transition. Examples are presented for light and heavy deformed nuclei, by using in the calculations experimental and theoretical energy levels.

Palavras-chave : Phase transition in nuclei; heat capacities.