Two-color laser-induced grating spectroscopy (TC-LIGS) via the A 2Σ+, v′=0 state has been used to study the B 2Π, v=28 and L 2Π, v=8 valence states and the Q 2Π, v=0 5pπ Rydberg state of NO. Energies for previously unobserved or unresolved transitions to the perturbed L 2Π1/2,3/2, v=8 and Q 2Π1/2,3/2, v=0 states are reported for the first time. The interaction between these states is reconsidered in light of the new assignments. A comparison of different detection methods made for the B 2Π1/2,3/2, v=28←A 2Σ+, v′=0 transitions demonstrates the ability of TC-LIGS to detect states that are difficult to detect by ionization or fluorescence-dip detection.
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McCormack et al. (1995) studied this question.