Characterization of the I(|Ω|=1)-X 1Σ+(0,0) band of thorium oxide

The I(|Ω|=1)-X1Σ+(0,0) band near 512 nm of thorium oxide has been recorded and analyzed field free and in the presence of both static electric and magnetic fields. The determined T00, B, and q field-free parameters for the I(|Ω|=1)(v=0) state are (incm-1)19539.3823±0.0003,0.328 69±0.000 03, and 0.001 54 ± 0.000 05. The Zeeman-induced shifts and splittings of the low-J lines were analyzed to determine g factors and suggest that the I(|Ω|=1)(v=0) state has a dominant 1Π character. The Stark tuning of the low-J lines was analyzed to determine the permanent electric dipole moment μel for the I(|Ω|=1)(v=0) state of 4.25 ± 0.02 D.