Medium modified two-body scattering amplitude from proton-nucleus total cross-sections

Area of Science:

• Nuclear Physics
• High-Energy Physics
• Radiation Physics

Background:

• In-medium nucleon-nucleon (N-N) cross-sections are crucial for modeling heavy-ion collisions.
• Previous work extracted these cross-sections directly from experimental data.
• Accurate cross-sections are vital for space radiation risk assessment.

Purpose of the Study:

• To investigate the ratio of the real to imaginary part of the two-body scattering amplitude in nuclear matter.
• To utilize these ratios with in-medium N-N cross-sections for calculating total proton-nucleus cross-sections.
• To validate the calculated cross-sections against experimental data.

Main Methods:

• Extraction of in-medium N-N cross-sections from experimental results.
• Application of the coupled-channel approach.
• Calculation of proton-nucleus cross-sections using the ratio of real to imaginary parts of the scattering amplitude.

Main Results:

• The ratio of the real to imaginary part of the two-body scattering amplitude in the medium was investigated.
• In-medium N-N cross-sections were combined with these ratios to compute total proton-nucleus cross-sections.
• Calculated cross-sections demonstrated excellent agreement with available experimental data.

Conclusions:

• The methodology provides accurate proton-nucleus cross-sections.
• These cross-sections are essential for reliable space mission radiation risk assessments.
• The study validates the use of experimentally derived in-medium N-N cross-sections and scattering amplitude ratios.