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Phys. Rev. C 69, 014603 (2004) [12 pages]

Isotope yields from central 112,124Sn+112,124Sn collisions: Dynamical emission?

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T. X. Liu, M. J. van Goethem, X. D. Liu, W. G. Lynch, R. Shomin, W. P. Tan, M. B. Tsang, G. Verde, A. Wagner*, H. F. Xi†, and H. S. Xu
National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA

M. Colonna and M. Di Toro
Laboratorio Nazionale del Sud, Via S. Sofia 44, I-95123 Catania, Italy and University of Catania, I-95123 Catania, Italy

M. Zielinska-Pfabe
Department of Physics, Smith College, Northampton, Massachusetts 01063, USA

H. H. Wolter
Ludwig-Maximilians-Universität, München, Germany

L. Beaulieu, B. Davin, Y. Larochelle, T. Lefort, R. T. de Souza, R. Yanez, and V. E. Viola
Department of Chemistry and IUCF, Indiana University, Bloomington, Indiana 47405, USA

R. J. Charity and L. G. Sobotka
Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA

Received 20 August 2002; revised 5 June 2003; published 15 January 2004

Isotopic yields for light particles and intermediate mass fragments have been measured for central 112Sn+112Sn, 112Sn+124Sn, 124Sn+112Sn, and 124Sn+124Sn collisions at E∕A=50 MeV and compared with predictions of stochastic mean field calculations. These calculations predict a sensitivity of the isotopic distributions to the density dependence of the asymmetry term of the nuclear equation of state. However, the secondary decay of the excited fragments modifies significantly the primary isotopic distributions and these modifications are rather sensitive to theoretical uncertainties in the excitation energies of the hot fragments. The predicted final isotope distributions are narrower than the experimental data and the sensitivity of the predicted yields to the density dependence of the asymmetry term is reduced.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.69.014603
DOI:
10.1103/PhysRevC.69.014603
PACS:
24.10.−i, 25.70.−z

*Present address: Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, D-01314 Dresden, Germany.

†Present address: Benton Associate, Toronto, Ontario, Canada.

 
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