D. V. Shetty

Heavy-residue isoscaling as a probe of the symmetry energy of hot fragments

The isoscaling properties of isotopically resolved projectile residues from peripheral collisions of {sup 86}Kr (25 MeV/nucleon) {sup 64}Ni (25 MeV/nucleon), and {sup 136}Xe (20 MeV/nucleon) beams on various target pairs are employed to probe the symmetry energy coefficient of the nuclear binding energy. The present study focuses on heavy projectile fragments produced in peripheral and semiperipheral collisions near the onset of multifragment emission (E{sup *}/A=2-3 MeV). For these fragments, the measured average velocities are used to extract excitation energies. The excitation energies, in turn, are used to estimate the temperatures of the fragmenting quasiprojectiles in the framework the Fermi gas model. The isoscaling analysis of the fragment yields provided the isoscaling parameters {alpha} that, in combination with temperatures and isospin asymmetries provided the symmetry energy coefficient of the nuclear binding energy of the hot fragmenting quasiprojectiles. The extracted values of the symmetry energy coefficient at this excitation energy range (2-3 MeV/nucleon) are lower than the typical liquid-drop model value {approx}25 MeV corresponding to ground-state nuclei and show a monotonic decrease with increasing excitation energy. This result is of importance in the formation of hot nuclei in heavy-ion reactions and in hot stellar environments such as supernova.

Symmetry energy and the isospin dependent equation of state

We show that the large sequential decay corrections obtained by Ono {\it et al} [nucl-ex/0507018], is in contradiction with both the other dynamical and statistical model calculations carried out for the same systems and energy. On the other hand, the conclusion of Shetty {\it {et al.}}

Critical behavior in light nuclear systems: Experimental aspects

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Reaction dynamics and multifragmentation in Fermi energy heavy ion reactions

Phys. Rev. C 70, 011601R (2004)

Enhanced production of neutron-rich rare isotopes in peripheral collisions at Fermi energies.

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Measuring the temperature of hot nuclear fragments

, that the experimental data favors Gogny

Democratic Decay of 6Be Exposed by Correlations

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Tracing the evolution of the symmetry energy of hot nuclear fragments from the compound nucleus towards multifragmentation

AS interaction (obtained assuming a significantly smaller sequential decay effects), is consistent with several other independent studies.

Constraining the symmetry term in the nuclear equation of state at subsaturation densities and finite temperatures

An extensive experimental survey of the features of the disassembly of a small quasi-projectile system with

Nuclear symmetry energy: An experimental overview

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