Global Rovibrational Analysis of Carbonyl Sulfide

Abstract A global analysis has been applied simultaneously on all data available for the rovibrational energies of carbonyl sulfide 16 O 12 C 32 S in the electronic ground state; data from all kinds of techniques: μW, RF, IR, laser, MBER, Stark, and IR-MWDR have been considered. All off-diagonal terms in the Hamiltonian (anharmonic, l -type, Stark, and polarizability terms) were taken into account in a one-step diagonalization procedure. A statistical agreement is obtained with all data and a set of 66 zero field molecular parameters have been determined (Stark parameters are published in another paper in this journal). Effective level constants and their uncertainties have been calculated up to the eighth order in J ( J + 1) for vibrational levels up to 4950 cm −1 .

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