Charge-pickup processes in relativistic heavy-ion reactions

K. Sümmerer, J. Reinhold, M. Fauerbach, J. Friese, H. Geissel, H.-J. Körner, G. Münzenberg, R. Schneider, and K. Zeitelhack
Phys. Rev. C 52, 1106 – Published 1 August 1995
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We have measured a complete isotope distribution of projectile-like nuclear-charge pickup products, formed by bombarding a Al17 target with 790A MeV Xe129 ions. The shape of the cross-section distribution indicates a dominant influence of evaporation processes during the formation of the final cesium fragments observed, thus masking to a large extent the primary processes involved in the charge exchange. We can show, however, that an intranuclear-cascade-plus-evaporation calculation can reproduce the observed yields, and that the effect of Δ-formation during the first stage of the reaction is visible even in the inclusive cross sections. The same model can explain the strong increase in total charge-pickup cross sections with increasing projectile mass noted previously by other authors. It is therefore not necessary to invoke coherent processes to explain this increase as has been suggested previously.

  • Received 31 March 1995


©1995 American Physical Society

Authors & Affiliations

K. Sümmerer, J. Reinhold, M. Fauerbach, J. Friese, H. Geissel, H.-J. Körner, G. Münzenberg, R. Schneider, and K. Zeitelhack

  • Gesellschaft für Schwerionenforschung, D-64220 Darmstadt, Germany
  • Physikdepartment E12, Technische Universität München, D-85747 Garching, Germany
  • Technische Hochschule Darmstadt, D-64289 Darmstadt, Germany

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Vol. 52, Iss. 2 — August 1995

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