Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 41: Heavy Ions IV
HK 41.4: Gruppenbericht
Donnerstag, 11. März 2004, 15:00–15:30, E
The Density Dependence of the Isovector EOS in Heavy Ion Collisions* — •H.H. Wolter1, Th. Gaitanos1,2, V. Baran2,3, M. Colonna2, M. Di Toro2, and Chr. Fuchs4 — 1Sektion Physik, Univ. of Munich — 2Lab. Naz. del Sud, INFN, Catania — 3NIPNE and Bucharest Univ. — 4Inst. Theor. Phys., Univ. Tübingen
The density dependence of the isovector equation-of-state of
nuclear matter is important for nuclear structure of rare
isotopes, for heavy ion collisions of asymmetric nuclei, and
for astrophysical processes like neutron star cooling of
supernova nucleosynthesis. On the other hand it is not well
contrained from nuclear matter theories. Heavy ion collisions
offer the possiblility to explore the isovector eos for low
densities in fragmentation reactions and for high densities in
flow phenomena and particle production. Our invstigations of
the high density eos are performed
in the framework of relativistic transport calculations,
where in the isovector sector the ρ and δ mesons
enter, where the effect of the latter is enhanced in
heavy ion collisions. Different observables have been
investigated and will be discussed in comparison with the
rather sparse experimental data. These include flow observables
v1, v2, pion production, and ratios of p/n or 3He/t
emmissions, e.g. in the Ru/Zr system. We see an observable
sensitivity on the isovector eos,
which suggests the investigation of even more asymmetric
heavy ion collision
of radiactive nuclei in the future.
* supported by BMBF, contract 06 LM 981.