Vol. 15, issue 09, article # 5

Abstract:

An equation for the spectral line profile derived within the framework of the far-wing line shape theory is used to retrieve a single set of parameters using the nonlinear least-square method. The corresponding line shape describes experimental data pertaining to the pure CO₂ gas at different temperatures in various spectral ranges. The HITRAN-86 database of spectral line characteristics serves a source of initial spectroscopic information. The obtained sets of parameters referred to the quantum and classical intermolecular interaction potentials describe experimental data on the spectral and temperature dependence of the absorption coefficients in wings of the СО₂ 1.4, 2.7, 4.3, and 15-mkm bands with the experimental accuracy.