Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-09-27
DAE Symposium on Nuclear Physics (2010)
Physics
Nuclear Physics
Nuclear Theory
2 pages, 2 figures, Contribution to DAE Symposium on Nuclear Physics, December 20-24, 2010, BITS, Pilani, Rajasthan,India-3330
Scientific paper
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.
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