Momentum Dependence of Nuclear Mean Field and multifragmentation in Heavy-Ion Collisions

TL;DR

This paper investigates how momentum dependent interactions affect multifragmentation in heavy-ion collisions, showing increased free nucleon emission and system size dependence, aligning with experimental data.

Contribution

It demonstrates the significant impact of momentum dependent interactions on fragment production and system size effects in heavy-ion collision simulations.

Findings

Momentum dependence increases free nucleon emission.

MDI influences system size dependence of fragments.

Results agree with experimental data.

Abstract

We report the consequences of implementing momentum dependent interactions (MDI) on multifragmentation in heavy-ion reactions over entire collision geometry. The evolution of a single cold nucleus using static soft equation of state and soft momentum dependent equation of state demonstrates that inclusion of momentum dependence increases the emission of free nucleons. However, no heavier fragments are emitted artificially. The calculations performed within the framework of quantum molecular dynamics approach suggest that MDI strongly influence the system size dependence of fragment production. A comparison with ALADiN experimental data justifies the use of momentum dependent interactions in heavy-ion collisions.