New approach of fragment charge correlations in 129Xe+(nat)Sn central collisions

Details New approach of fragment charge correlations in 129Xe+(nat)Sn central collisions New approach of fragment charge correlations in 129Xe+(nat)Sn central collisions

2002-12-12

arxiv.org/abs/nucl-ex/0212012v3

Nucl.Phys. A730 (2004) 431-447

Physics

Nuclear Physics

Nuclear Experiment

23 pages, 9 figures, revised version with an added figure and minor changes. To appear in Nuclear Physics A

Scientific paper

A previous analysis of the charge (Z) correlations in the $\Delta Z-$ plane for Xe+Sn central collisions at 32 MeV/u has shown an enhancement in the production of equally sized fragments (low $\Delta Z$) which was interpreted as an evidence for spinodal decomposition. However the signal is weak and rises the question of the estimation of the uncorrelated yield. After a critical analysis of its robustness, we propose in this paper a new technique to build the uncorrelated yield in the charge correlation function. The application of this method to Xe+Sn central collision data at 32, 39, 45 and 50 MeV/u does not show any particular enhancement of the correlation function in any $\Delta Z$ bin.

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