Detection, assignment of the microwave spectrum and the molecular Stark and Zeeman effects in CSe, and the Zeeman effect and sign of the dipole moment in CS

Abstract

The microwave spectrum of seven isotopic species of CSe has been observed leading to an internuclear distance of d=(1.67647± 0.0002)× 10−8cm. The Stark effect measurements led to an electric dipole moment of | μ |=(1.99± 0.04) D. The molecular Zeeman effect was also observed in CSe leading to the molecular g⊥ value in 12C80Se of g⊥=−0.2431± 0.0016, the magnetic susceptibility anisotropy of χ⊥ − χ∥=(27.8± 1.4)× 10−6erg/G2· mole, and the molecular electric quadrupole moment of Q∥=−(2.6± 1.6)× 10−26esu·cm2. The molecular Zeeman effect was observed in three isotopic species of CS leading to the measurement of the sign of the electric dipole moment of −CS+. The results are compared to similar molecules.