INFRARED SPECTRA AND ANISOTROPIC POTENTIAL ENERGY SURFACES FOR He-CO AND $H_{2}-CO$

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 Title: INFRARED SPECTRA AND ANISOTROPIC POTENTIAL ENERGY SURFACES FOR He-CO AND $H_{2}-CO$ Creators: Chuaqui, Claudio; Le Roy, Robert J.; McKellar, A. R. W. Issue Date: 1994 Publisher: Ohio State University Abstract: For both the $^{3}He-CO$ and $^{4}He-CO,$ and the $H_{2}-CO$ and $D_{2}-CO$ Van der Waals bimers, fully resolved infrared spectra have been measured in the 4.7 $\mu m$ region near the fundamental band origin of the CO monomer. Only a small fraction of the observed lines could be assigned using conventional spectroscopic techniques, and little insight was gained from synthetic spectra generated from published {ab initio} potentials for these systems. However, comparisons with synthetic spectra generated from various other trial potentials led to complete sets of assignments for the He complexes and near-complete sets for the $H_{2}(j=0)-CO$ and $D_{2}(j=0)-CO$ species. These in turn allowed us to determine new anisotropic potential energy surfaces for these species which differ markedly with those reported, previously and raise interesting questions regarding the tests of previous potential surfaces based on very low temperature microwave line broadening cross sections. Description: Author Institution: Department of Chemistry, University of British Colombia; Guelph-Waterloo Centre for Graduate Work in Chemistry, University of Waterloo; Herzberg Institute of Astrophysics, National Research Council URI: http://hdl.handle.net/1811/13155 Other Identifiers: 1994-RE-03