Nucl 23-Comparison Of The Isotopic Cross Sections Measured In The Fragmentation Of 136xe And 124xe Projectiles With The Epax Parameterization

It is one of the main interests of the present research to extend the experimental investigations towards the rarely produced isotopes with extreme N/Z in order to investigate their structure properties or to study the dependence of the nuclear equation of state on the isotopic composition of the system. To produce these exotic nuclei experimentally a reliable description of the production cross sections is necessary to predict the production rates. The most recent and frequently used parameterization of the production cross sections is EPAX developed in [1,2]. In two experiments recently performed at the Fragment Separator at GSI, the isotopically resolved residues over the broad range of the nuclear charge were measured in the fragmentation of Xe and Xe in a lead target at 1 A GeV. The isotopic distributions measured in these experiments form an extensive database for testing the predictive power of the cross-section parameterizations especially from the point of view of the N/Z dependence. To obtain a more complete overview on the predictive power of EPAX, the measured isotopic distributions of elements Z=15,45,50 in both experiments are compared with EPAX in Figure 1.