Stark, Zeeman, and hyperfine properties of v=0, v=1, and the equilibrium configuration of hydrogen fluoride

Molecular beam electric resonance spectroscopy has been done on the v = 0 and v = 1 states of hydrogen fluoride in external electric and magnetic fields. The v = 1 state was populated using a color center laser. v = 0, v = 1, and equilibrium configuration results have been obtained for the HF dipole moment, fluorine and proton spin rotation interactions, fluorine and proton magnetic shielding anisotropics, both direct and indirect spin-spin interactions, rotational magnetic moment, and magnetic susceptibility. All of these properties can be extrapolated to v = 2 with high accuracy and to higher states with reasonable confidence. First and second derivatives with respect to internuclear distance have also been obtained for several of these properties. Comparisons of HF and DF dipole moments indicate significant differences arising from Born-Oppenheimer breakdown.