Temperature dependence of the nuclear symmetry energy

Abstract

We have studied the properties of A=54 and A=64 isobars at temperatures T \leq 2 MeV via Monte Carlo shell model calculations with two different residual interactions. In accord with empirical indications, we find that the symmetry energy coefficient, b_{sym}, is independent of temperature to within 0.6 MeV for T \leq 1 MeV. This is in contrast to a recent suggestion of a 2.5 MeV increase of b_{sym} for this temperature, which would have significantly altered the supernova explosion scenario.

7 pages, including 2 figures, Caltech preprint MAP-177

References in corpus (3)

• A Full $PF$ Shell Model Study of a~=~48 Nuclei
• Monte Carlo evaluation of path integrals for the nuclear shell model
• Practical solution to the Monte Carlo sign problem: Realistic calculations of 54Fe

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• Effects of isospin and momentum dependent interactions on thermal properties of asymmetric nuclear matter
• Evolution of the symmetry energy of hot neutron-rich matter formed in heavy-ion reactions
• On the temperature dependence of the symmetry energy
• Experimental study of fragmentation products in the reactions 112Sn + 112Sn and 124Sn + 124Sn at 1 AGeV
• Symmetry energy of fragments produced in multifragmentation
• Nuclear matter symmetry energy from generalized polarizabilities: dependences on momentum, isospin, density and temperature
• Systematic thermal reduction of neutronization in core-collapse supernovae
• Nuclear Shell Structure in a Finite-Temperature Relativistic Framework
• Isospin dependence of nuclear matter symmetry energy coefficients
• Temperature dependence of nuclear matter generalized isovector symmetry energy with Skyrme-type interactions