Analysis of the collision-induced absorption spectra of H2 in H2-N2 in the range 5600-9500 cm-1

Enhancement spectra of the collision-induced absorption (CIA) of H2 in the region 5600-9500 cm-1 in binary H2-N2 mixtures were investigated at room temperature for base densities of H2 in the range 89-145 amagat and for partial densities of N2 in the range 30-350 amagat. Enhancement absorption profiles of H2-N2 in the investigated region consist of the superposition of two main parts, the first part is formed of quadrupolar double transitions of the type X1(J) + X1(J) in the range 5600-8500 cm-1 and the second formed of quadrupolar single transitions of the type X2(J) + X0(J) from 7500 to 9500 cm-1, where X is an O(ΔJ = -2), Q(ΔJ = 0) or S(ΔJ = +2) transition. The Birnbaum-Cohen lineshape function was found to give satisfactory fits of the synthetic profiles to the experimental profiles. Lineshape function parameters obtained from the analysis are given