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Erlangen 2001 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 10: Postersitzung: Theorie

HK 10.6: Poster

Dienstag, 20. März 2001, 10:30–12:45, R

Anomalous radial expansion in central heavy-ion reactions — •K. Morawetz1,2, M. Płoszajczak3, and V.D. Toneev41Max-Planck-Institute for the Physics of Complex Systems, Noethnitzer Str. 38, 01187 Dresden, Germany — 2LPC-ISMRA, Bld Marechal Juin, 14050 Caen, France — 3Grand Accélérateur National d’Ions Lourds (GANIL), CEA/DSM – CNRS/IN2P3, BP 5027, F-14076 Caen Cedex 05, France — 4Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia

The expansion velocity profile in central heavy-ion reactions in the Fermi energy domain is examined. The radial expansion is non-Hubblean and in the surface region it scales proportional to a higher exponent (α > 1) of the radius. The anomalous expansion velocity profile is accompanied by a power law nucleon density profile in the surface region. Both these features of central heavy-ion reactions disappear at higher energies, and the system follows a uniform Hubble expansion (α ≃ 1).

Phys. Rev. C 62, 64602: Anomalous radial expansion in central heavy-ion reactions,
K. Morawetz, M. Płoszajczak, V.D. Toneev

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