Charge-pickup processes in relativistic heavy-ion reactions
- Gesellschaft fuer Schwerionenforschung, D-64220 Darmstadt (Germany)
We have measured a complete isotope distribution of projectile-like nuclear-charge pickup products, formed by bombarding a {sup 17}Al target with 790{ital A} MeV {sup 129}Xe 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 {Delta}-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.
- OSTI ID:
- 90558
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 2 Vol. 52; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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