Equilibrium structure of CO+from its millimeter wave spectrum. Breakdown of the Bornndash;Oppenheimer approximation@fa@f)

摘要

Microwave transitions of CO+have been observed for several isotopic substitutions, in different vibrational states:12Cthinsp;16O+(v=0,1,2,3,4),12Cthinsp;18O+(v=0,1),13Cthinsp;16O+(v=0,1), and13Cthinsp;18O+(v=0). All measured frequencies are fitted together in a one step procedure, leading to a precise determination of molecular constants and equilibrium structure. The vibrational dependence of the13C hyperfine structure is pointed out, and the Dgr;C01and Dgr;O01mass scaling coefficients are determined.