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Fragment isospin distributions and the phase diagram of excited nuclear systems

Ad. R. Raduta

nucl-tharXiv:nucl-th/0512053

Abstract

Fragment average isospin distributions are investigated within a microcanonical multifragmentation model in different regions of the phase diagram. The results indicate that in the liquid phase <N/Z> versus Z is monotonically increasing, in the phase coexistence region it has a rise and fall shape and in the gas phase it is constant. Deviations from this behavior may manifest at low fragment multiplicity as a consequence of mass/charge conservation. Characterization of the &#34;free&#34; and &#34;bound&#34; phases function of fragment charge reconfirms the neutron enrichment of the &#34;free&#34; phase with respect to the &#34;bound&#34; one irrespectively the localization of the multifragmentation event in the phase diagram.

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