THE ELECTRIC-DIPOLE MOMENT AND HYPERFINE-STRUCTURE OF NO B-2-PI - HIGH-RESOLUTION LASER-INDUCED FLUORESCENCE SPECTROSCOPY OF THE B2-PI(V=3-5)[-X2-PI(V=0) BANDS

The dipole moment of NO(B (2) Pi) was determined for the first time by high resolution laser-induced fluorescence molecular beam spectroscop y. Specific values obtained areas follows: mu(upsilon' = 3) = 0.293(3) D, mu(upsilon' = 4) = 0.276(9) D and mu(upsilon' = 5) = 0.261(7) D. A n RKR analysis allowed the first two moments of the dipole moment func tion to be derived. Quantum beats were observed for the f-parity Lambd a-doublets and the partial resolution of the hyperfine structure allow ed the hyperfine energy level ordering to be determined. Accurate mole cular constants were also obtained for B(upsilon' = 4 and 5) levels.