arXiv:nucl-th/0507065·v1·Nuclear Theory
Retardation of Particle Evaporation from Excited Nuclear Systems Due to Thermal Expansion
J. Tõke🇺🇸 · L. Pieńkowski🇺🇸 · M. Houck🇺🇸 · W.U. Schröder🇺🇸 · L.G. Sobotka🇺🇸
Abstract
Particle evaporation rates from excited nuclear systems at equilibrium matter density are studied within the Harmonic-Interaction Fermi Gas Model (HIFGM) combined with Weisskopf's detailed balance approach. It is found that thermal expansion of a hot nucleus, as described quantitatively by HIFGM, leads to a significant retardation of particle emission, greatly extending the validity of Weisskopf's approach. The decay of such highly excited nuclei is strongly influenced by surface instabilities.