Moment analysis in collision-induced absorption: Determination of a single parameter empirical model for the induced dipole moment of He-Ar gas mixtures

Article type: Research Article

Authors: El-Kader, M.S.A.^{a; *} | Maroulis, G.^b

Affiliations: [a] Department of Engineering Mathematics and Physics, Faculty of Engineering, Cairo University, Giza 12211, Egypt | [b] Department of Chemistry, University of Patras, Patras GR-26500, Greece

Correspondence: [*] Corresponding author: M.S.A. El-Kader, Department of Engineering Mathematics and Physics, Faculty of Engineering, Cairo University, Giza 12211, Egypt. E-mail: mohamedsay68@hotmail.com.

Abstract: We present a method for the construction of a one-adjustable-parameter empirical model for the induced dipole moment. The method is based on classical physics principles and relies on the first three spectral moments of the collision-induced absorption spectra at various temperatures and new interaction potentials. In this work it is applied to the spectra of He-Ar mixtures. Our values are in good agreement with the available ab initio data. The profiles calculated with these models at various temperatures are in excellent agreement with experiment.

Keywords: Induced dipole moment, interatomic potentials, He-Ar mixtures

DOI: 10.3233/JCM-200043

Journal: Journal of Computational Methods in Sciences and Engineering, vol. 21, no. 3, pp. 577-592, 2021