Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 33: Heavy Ions III

HK 33.1: Group Report

Wednesday, March 10, 2004, 14:00–14:30, E

Isotope Mixing and Isospin Dependence of the Caloric Curve Measured in Central ^124,129Xe+^112,124Sn at 100 A.MeV
and ¹²C+^112,124Sn at 300 A.MeV Bombarding Energy — •Arnaud Le Fèvre — GSI - KPIII - Planckstrasse 1 - D-64291 Darmstadt

Isospin effects measured with the 4π multidetector INDRA at GSI are presented. In a first part, four different combinations of central collisions of ^124,129Xe+^112,124Sn are compared at the same bombarding energy of 100 A.MeV. The degree of isospin mixing between target and projectile is studied using different isospin-tracer observables and isotope-yield ratios. In a second part, thermal properties of the target spectator break-up in the collisions ¹²C+^112,124Sn at 300 A.MeV bombarding energy are investigated. By extracting the thermal component in the isotope yields, using a moving source fit method, we deduce the caloric curves corresponding to the two different Sn isotopes.