The Astrophysical Journal · 1994 · 40 citations · 0 references
Natural SciencesPhysicsCondensed Matter PhysicsNuclear PhysicsSpectroscopyFine StructureHyperfine StructureInfrared SpectroscopyLaser SpectroscopyMagnetic Resonance SpectroscopyAtomic Transition FrequenciesFar-infrared SpectroscopyFine Structure TransitionsFine-structure SplittingHyperfine InteractionsHyperfine Structure MeasurementsHyperfine Transition FrequenciesSpectroscopic Transition Frequencies
The far-infrared laser magnetic resonance spectra associated with both fine-structure transitions in (N-14)+ in its ground P-3 state have been recorded. This is the first laboratory observation of the J = 1 left arrow 0 transition and its frequency has been determined two orders of magnitude more accurately than previously. The remeasurement of the J = 2 left arrow 1 spectrum revealed a small error in the previous laboratory measurements. The fine-structure splittings (free of hyperfine interactions) determined in this work are (delta)E<SUB>10</SUB> = 1461.13190 (61) GHz, (delta)E<SUB>21</SUB> = 2459.38006 (37) GHz. Zero-field transition frequencies which include the effects of hyperfine structure have also been calculated. Refined values for the hyperfine constants and the g<SUB>J</SUB> factors have been obtained.