Spectroscopic constants of the known electronic states of lead monofluoride

Based on measurements made by mass-resolved 1 + 1′ + 1″ resonance-enhanced multiphoton ionization spectroscopy, we have determined new molecular constants describing the rotational and fine structure levels of the B, D, E, and F states of the most abundant isotopic variant 208Pb19F, and we summarize the spectroscopic constants for all the know electronic states of the radical. Many spectroscopic constants for the isotopologues 206Pb19F and 207Pb19F have also been determined. The symmetry of the D-state is found to be 2Π1/2, and the F-state is found to be an Ω = 3/2 state.