Retardation of Particle Evaporation from Excited Nuclear Systems Due to Thermal Expansion

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.

References in corpus (4)

• The Caloric Curve for Mononuclear Configurations
• The Role of Surface Entropy in Statistical Emission of Massive Fragments from Equilibrated Nuclear Systems
• Comparison of mid-velocity fragment formation with projectile-like decay
• Liquid-Gas Coexistence and Critical Behavior in Boxed Pseudo-Fermi Matter

Cited by in corpus (5)

• The many facets of the (non relativistic) Nuclear Equation of State
• Statistical description of nuclear break-up
• Isoscaling in statistical fragment emission in an extended compound nucleus model
• Common Signatures of Statistical Coulomb Fragmentation of Highly Excited Nuclei and Phase Transitions in Confined Microcanonical Systems
• Interaction of 160 GeV- Muon with Emulsion Nuclei