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arxiv: nucl-ex/0107012 · v1 · submitted 2001-07-17 · ⚛️ nucl-ex

Fragment Isospin as a Probe of Heavy-Ion Collisions

H. Xu (1) , R. Alfaro (1) , B. Davin (1) , L. Beaulieu (1) , Y. Larochelle (1) , T. Lefort(1) , R. Yanez(1) , R.T. de Souza(1) T.X. Liu(2)
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X.D. Liu(2) W.G. Lynch(2) R. Shomin(2) W.P. Tan(2) M.B. Tsang(2) A. Vander Molen(2) A. Wagner(2) H.F. Xi(2) C.K. Gelbke(2) R.J. Charity(3) L.G. Sobotka(3) A.S. Botvina(4) ((1) Department of Chemistry Indiana University Cyclotron Facility Indiana University (2) NSCL Department of Physics Astronomy Michigan State University (3) Department of Chemistry Washington University St. Louis (4) GSI Darmstadt Germany Institute for Nuclear Research Russian Academy of Science)
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keywords collisionscentralperipheralcomparedisotopemid-rapidityproducedratios
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Isotope ratios of fragments produced at mid-rapidity in peripheral and central collisions of 114Cd ions with 92Mo and 98Mo target nuclei at E/A = 50 MeV are compared. Neutron-rich isotopes are preferentially produced in central collisions as compared to peripheral collisions. The influence of the size (A), density, N/Z, E*/A, and Eflow/A of the emitting source on the measured isotope ratios was explored by comparison with a statistical model (SMM). The mid-rapidity region associated with peripheral collisions does not appear to be neutron-enriched relative to central collisions.

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