The depolarized interaction-induced light scattering spectrum and ground state potential curve of gaseous argon

The depolarized interaction-induced light scattering spectrum of argon gas at room temperature, over an extended frequency domain with comparable accuracy, and ranging from 0 to 400 cm-1 with high-energy beam results and pressure virial coefficients, has been used to derive the empirical isotropic multiparameter Morse-Morse-Morse-spline-van der Waals interatomic potential. Absolute zeroth, second and fourth moments of the binary spectrum have been measured and compared with theoretical calculations using various models for the interatomic potential. In addition, vibrational energy levels and viscosities calculated for the new potential are compared with experimental ones. The results show that it is the most accurate potential reported to date for this system. (author)