Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 4: Schwerionenkollisionen und QCD Phasen
HK 4.6: Vortrag
Montag, 4. März 2013, 12:30–12:45, HSZ-204
Symmetry Energy Dependence of Light Fragment Production in Heavy Ion Collisions — Malgorzata Zielinska-Pfabe1, Piotr Decowski1, Maria Colonna2, Remi Bougault3, and •Hermann Wolter4 — 1Smith Coll., Northhampton, Mass 01063, USA — 2LNS, INFN, I-95123 Catania, Italy — 3LPC Caen, F-14050 Caen Cedex, France — 4Univ. Munich, D-85748 Garching, Germany
The nuclear symmetry energy depends both on the density and on momentum, expressed by the difference in neutron and proton effective masses. Both behaviors are not well known microscopically and are investigated in heavy ion collisions. Here we discuss sensitive observables in a region of densities around saturation density. Of interest has been the emission (yields, spectra) of neutrons and protons. We extend these investigations to light fragments, in particular to t/3He ratios. We perform stochastic transport calculations of collisons of different Xe+Sn isotopes in the energy range of 32-150 AMeV with variation of the symmetry energy potential and the effective masses, and compare to preliminary INDRA data. We find, in particular, that the spectra of single n/p and t/3He ratios are promising to disentagle the density and momentum dependence of the symmetry energy.