Infrared diode laser spectroscopic study of the active nitrogen. The electronic transition between the lowest singlet metastable states a 1Πg–a′ 1Σ−u, 0–0 band
- 1 December 1987
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 87 (11) , 6434-6436
- https://doi.org/10.1063/1.453474
Abstract
The a 1Πg–a′ 1Σ−u, 0–0 band of the molecular nitrogen was observed in an electric discharge plasma of nitrogen using infrared diode laser spectroscopy at Doppler-limited resolution. Precise values were obtained for the rotational constants and the energy separation between the two electronic states. The effect of Λ-type doubling in the a 1Πg state was observed as small shifts of Q branch and P/R branch transitions to higher and lower frequencies, respectively, than those expected if Λ doubling were absent.Keywords
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