Investigating Scattering Properties of ²⁰ Ne- ⁴⁰ Ar Atoms mixture in the Temperature Range 90-120 K

Galitskii-Migdal-Feynman (GMF) model is employed to compute the total scattering cross section σ T and the viscosity scattering cross section σ η for a mixture of 20 Ne and 40 Ar atoms over a temperature range of 90-120 K and at various number densities. Both σ T and σ η are determined as a function of relative momentum at different temperatures and densities. It is observed that, at higher density, both cross sections exceed their corresponding values at lower density. The influence of temperature on σ T and σ η is also examined to investigate the thermal effects on transport properties; no significant temperature-induced variation is detected between 90 and 120 K. Additionally; the contribution of partial scattering waves is analyzed. The results reveal a rich resonance spectrum with multiple sharp peaks corresponding to different partial waves. At low energy, the S-wave dominates the scattering. As the relative momentum increases, a D-wave resonance emerges. With further increase in relative momentum, additional quasi-states corresponding to ℓ=4, ℓ=6 and ℓ=8 are also observed. Finally, the average values of σ T and σ η are computed as a function of temperature: 〈σ T 〉 decreases with increasing temperature, whereas 〈σ η 〉 shows a slight increase.