Darmstadt 2008 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 14: Theorie

HK 14.3: Vortrag

Montag, 10. März 2008, 17:15–17:30, 2F

A statistical model for hot nuclear matter — •Matthias Hempel and Jürgen Schaffner-Bielich — Institut für Theoretische Physik, J. W. Goethe-Universität, Max-von-Laue-Str. 1, 60438 Frankfurt am Main

We study the equation of state and the composition of nuclear matter at finite temperature with a grand canonical model which assumes nuclear statistical equilibrium. Matter is described as a thermodynamic ensemble of nucleons, photons, leptons and all possible nuclei. For the nucleons the relativistic mean field theory is used, the masses of the nuclei are taken from existing nuclear structure calculations, which were corrected for effects of finite temperature and the surrounding medium. The wide range of density, temperature and proton fractions which is present in type II supernovae explosions is analysed. Results for hot neutron stars and supernova explosions are presented, with emphasis on the liquid-gas phase transition region of nuclear matter, which can also be explored by heavy ion experiments.