Optical model methods of predicting nuclide production cross sections from heavy ion fragmentation

Area of Science:

• Nuclear Physics
• Quantum Mechanics
• High-Energy Physics

Background:

• Calculating isotope and element production cross sections is crucial for understanding nuclear reactions.
• Existing models often require refinement for accurate predictions in heavy nuclei fragmentation.
• Heavy nuclei fragmentation by protons and heavy ions presents complex reaction dynamics.

Purpose of the Study:

• To present quantum mechanical optical potential methods for calculating inclusive cross sections.
• To model the fragmentation of heavy nuclei induced by intermediate- and high-energy projectiles.
• To improve the accuracy of predicting elemental and isotopic yields in nuclear reactions.

Main Methods:

• Utilized a modified abrasion-ablation-FSI (frictional spectator interaction) collision model.
• Treated the abrasion stage as a quantum mechanical knockout process.
• Incorporated electromagnetic dissociation contributions using Weiszacker-Williams theory.

Main Results:

• Developed a quantum mechanical approach for estimating prefragment excitation energies.
• The ablation stage models deexcitation via particle and photon emission.
• Calculated elemental and isotopic production cross sections showed good agreement with experimental data.

Conclusions:

• The presented quantum mechanical optical potential methods provide accurate predictions for heavy nuclei fragmentation.
• The modified abrasion-ablation-FSI model effectively describes the complex processes involved.
• This approach enhances the predictive power for nuclear reaction cross sections across various conditions.