Radio-Frequency and Microwave Spectra of NaF by the Molecular-Beam Electric-Resonance Method

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Abstract
Radio-frequency transitions of the type (J, mJ±1)→(J, mJ) have been observed for 23Na19F by the molecular-beam electric-resonance method. Spectra were observed for the first three vibrational states of the J=1 rotational level and for the first vibrational state of the J=2 rotational level. From the analysis of the radio-frequency spectra, dipole moments μv, sodium quadrupole coupling constants (eQq)v, spin—rotation interaction constants cNa and cF, and spin—spin interaction constants c3 and c4 were determined for 23Na19F. Observations of J=1→J=0 microwave transitions yielded rotational constants Bv for the v=0, 1, and 2 vibrational states. The molecular constants determined for 23Na19F are: μv=8.12349+0.06436(v+12)+0.00037(v+12)2±0.001 D,(eQq)0=−8440.1±1.5 kc/sec;(eQq)1=−8327.9±1.5 kc/sec;(eQq)2=−8220.5±2.0 kc/sec,cNa=1.4±0.5 kc/sec,cF=2.0±0.3 kc/sec,c3=3.85±0.25 kc/sec,c4=0.0+0.4 kc/sec−0.1 kc/sec,B0=13029.811±0.002 Mc/sec,B1=12894.543±0.003 Mc/sec,B2=12760.674±0.004 Mc/sec.

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