Molecular-Beam Optical Stark and Zeeman Study of the[17.8]0+–X1Σ+(0,0)Band System of AuF.

The [17.8]0+–X1Σ+(0,0) band of gold monofluoride, AuF,has been recorded at a resolutionof 40 MHz both field free and in the presence of a static electricand magnetic field. The observed Stark shifts were analyzed to determinethe permanent electric dipole moment, μel, of 2.03± 0.05 D and 4.13 ± 0.02 D, for the [17.8]0+(v= 0) and X1Σ+(v= 0) states, respectively. The small magnetic tuning observed forthe [17.8]0+(v= 0) state is attributedto rotational and magnetic field mixing with the [17.7]1 state andhas been successfully modeled using an effective Hamiltonian for the 3Π state. A comparison with the numerous published theoreticalpredictions is made. [ABSTRACT FROM AUTHOR]