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A simplified optical model description of heavy ion fragmentation
L W Townsend1, J W Wilson, J W Norbury
1NASA Langley Research Center, Hampton, VA 23665, USA.
Canadian Journal of Physics
|January 1, 1985
Summary
This study models ion fragmentation using an abrasion-ablation model, predicting isotope production cross sections for argon-40 and iron-56 collisions. Results align with experimental data, validating the fragmentation model.
Area of Science:
- Nuclear Physics
- High-Energy Physics
Background:
- Understanding nuclear fragmentation is crucial for astrophysics and particle physics.
- Previous models often simplify the complex interactions during ion collisions.
Purpose of the Study:
- To apply and validate a simple abrasion-ablation fragmentation model for heavy ion collisions.
- To predict and compare isotope and element production cross sections with experimental data.
Main Methods:
- Utilized a quantum-mechanical abrasion model based on optical potential approximation.
- Treated the ablation stage as compound nucleus evaporation using the EVAP-4 Monte Carlo program.
- Calculated decay probabilities for particle emission channels.
Main Results:
- Predicted production cross sections for sulfur, phosphorus, silicon, and aluminum isotopes from 40Ar + 12C collisions.
- Compared model predictions with experimental data for accuracy.
- Extended the model to compare 56Fe + 12C and 56Fe + 208Pb collisions.
Conclusions:
- The abrasion-ablation model provides a viable framework for describing nuclear fragmentation.
- The model successfully predicts isotope and element production cross sections, aligning with experimental findings.
- The study validates the model's applicability across different ion-target combinations and energies.