An energy-dependent numerical model for the condensation probability, ?j

Abstract

The "condensation" probability, γ j , is an important variable in the preequilibrium stage of nuclear spallation reactions. It represents the probability that p j excited nucleons (excitons) will "condense" to form complex particle type j in the excited residual nucleus. It has a significant impact on the emission width, or probability of emitting fragment type j from the residual nucleus. Previous formulations for γ j were energy-independent and valid for fragments up to 4 He only. This paper explores the formulation of a new model for γ j , one which is energy-dependent and valid for up to 28 Mg, and which provides improved fits compared to experimental fragment spectra.