Abstract
With 85‐cm and 21‐foot normal‐incidence vacuum spectrographs the NO emission spectrum in the far‐ultraviolet region was investigated. The existence of the ε‐system is confirmed. The β′ bands are reinvestigated, and a curious appearance was observed in the (4,0) band. New bands which have an appearance similar to the β′ bands are observed in the region of 1500A, and tentative analysis is made.
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