Accurate universal parameterization of absorption cross sections II--neutron absorption cross sections

Area of Science:

• Nuclear physics
• High-energy physics

Background:

• Previous work parameterized absorption cross sections for charged ion collisions.
• A need existed for a comprehensive model covering both charged and uncharged collision pairs.

Purpose of the Study:

• To extend existing parameterization of absorption cross sections to include neutron-nucleus collisions.
• To provide a unified model for absorption cross sections across various collision systems (charged and/or uncharged).
• To validate the extended model against experimental data.

Main Methods:

• Extension of a previously developed parameterization for absorption cross sections.
• Inclusion of physical parameters relevant to low (optical potential) and intermediate (Pauli operator) energies.
• Validation of the model by comparing calculated cross sections with experimental results.

Main Results:

• The parameterization is successfully extended to neutron-nucleus collisions from 1 MeV to a few GeV.
• The model accounts for the importance of surface optical potential at low energies and the Pauli operator at intermediate energies.
• Calculated absorption cross sections show improved agreement with experimental data compared to previous models.

Conclusions:

• The extended parameterization offers a comprehensive approach to calculating absorption cross sections for diverse nuclear collision systems.
• The model's accuracy is enhanced by incorporating energy-dependent physical parameters.
• This work provides a valuable tool for nuclear physics research and applications.