Dynamical Study of Multifragmentation and Related Phenomena in Heavy-Ion Collisions

TL;DR

This paper investigates multifragmentation in heavy-ion collisions, analyzing fragment emission, clusterization mechanisms, and the role of momentum-dependent interactions to understand nuclear matter properties.

Contribution

It introduces a detailed analysis of fragment emission and clusterization in heavy-ion collisions, emphasizing the dynamical origin of fragments and the significance of momentum-dependent interactions.

Findings

Peak IMF multiplicity follows a power law with system mass.

Early fragment recognition indicates a dynamical origin.

Momentum-dependent interactions are crucial for probing nuclear EoS.

Abstract

In the first part of thesis, we shall deal with fragment emission in central collisions studied as a function of beam energy and system mass. Central collisions are also important candidate in view of exploring collective expansion and squeeze out phenomena \cite{dan93}. We have simulated the central collisions of $^{20}Ne+^{20}Ne$, $^{40}Ar+^{45}Sc$, $^{58}Ni+^{58}Ni$, $^{86}Kr+^{93}Nb$, $^{129}Xe+^{124}Sn$, and $^{197}Au+^{197}Au$. Peak IMF multiplicity is observed to follow power law of form: $c A^{\tau}_{tot}$, with exponent $\tau$ close to unity. Next we try to understand the clusterization mechanism in spectator matter fragmentation using \emph{simulated annealing clusterization algorithm} (SACA) advanced by Puri \emph{et al}. Earlier recognition of fragments structure (around 60 fm/c) also points towards dynamical origin of fragments. We shall also highlight the importance of momentum dependent interactions in probing nuclear EoS via intermediate energy heavy-ion collisions. Estimation of baryonic entropy would also be discussed.