Molecular constants of OCS isotopes in the (0110) vibrational state measured by molecular-beam electric-resonance spectroscopy

The ΔJ = 0,l-doublet transitions of OCS isotopes (¹⁶O¹²C³²S, ¹⁶O¹²C³³S, ¹⁶O¹²C³⁴S, ¹⁶O¹³C³²S and ¹⁸O¹²C³²S) in the (01¹0) vibrational state have been measured in a molecular-beam electric-resonance spectrometer equipped with a nozzle source. Rotation-vibration coupling constants and electric dipole moments have been determined for all isotopes, and the spin-rotation and the quadrupole coupling constants for the ³³S nucleus in ¹⁶O¹²C³³S in the υ₂=0 and υ₂=1 states.