Observation of an infrared band sequence in molecular oxygen at 0.1 Torr.
The 1-5-microm emission spectrum from the negative glow of a pulsed oxygen discharge at 0.1 Torr has been examined with a Fourier spectrometer in the time-resolved mode. In addition to well-known atomic lines, our spectrum contains nine regularly spaced linelike features around 4000 cm(-1). We interpreted these features as molecular Rydberg-Rydberg transitions of the type DeltaLambda = 1 and Deltaupsilonv = 0. Additional features at 7000 cm(-1) are assigned to the f(1)Sigma(u)(<i/>+) -d(1)II(g) transition in oxygen, resulting in greatly improved spectroscopic constants for the d state.
Barowy
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Sakai
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Chang
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