In this work we present a theoretical and experimental study of the acetylene -hydrogen system.A potential surface considering rigid monomers has been obtained by ab initio quantum chemistry methods. This 4-dimensional potential is further employed to compute using the close-clouping approach and the coupled-states approximation pressure broadening coefficients of C 2 H 2 isotropic Raman Q lines over a temperature range of 77 to 2000 K. Experimental data for the acetylene ν 2 Raman lines broadened by molecular hydrogen are obtained using stimulated Raman spectroscopy.The comparison at 143 K of theoretical values with experimental data is promising. Approximations to increase computational efficiency are proposed. *

No abstract

No abstract