RYDBERG ABSORPTION SERIES OF N2

Abstract

The absorption spectrum of N2 in the 600–1000 Å region, particularly the Rydberg series, has been reinvestigated with a grazing incidence spectrograph with a 6.8-meter concave grating.Worley–Jenkins' Rydberg series which converges to the [Formula: see text] state of [Formula: see text] was extended to m = 31. It is suggested that the doublet character of this series is due to the two electronic transitions whose upper states are 1Πu and [Formula: see text] given by the electron configurations:[Formula: see text]and[Formula: see text]respectively.Eight Rydberg series, including Worley's third series, were observed in the region between 710 and 950 Å. These series are divided into two groups, each consisting of four vibration series, ν′ = 0, 1, 2, and 3, with one converging to the A2Πu, 1/2 state and the other to the A2Πu, 3/2 state of [Formula: see text]. The upper electronic states of these two groups are assigned as 1Πu and 3Πu states given by the electron configuration:[Formula: see text]Hopfield's Rydberg series which converges to the [Formula: see text] state of [Formula: see text] was extended to m = 21, and in addition, one vibration series (ν′ = 1) was newly observed. The upper electronic states of the series are assigned as [Formula: see text] states, given by the configuration:[Formula: see text]Another absorption series, which is accompanied closely by the Hopfield emission series, was also observed and the upper electronic states of the series are assigned as [Formula: see text] states, given by the configuration:[Formula: see text]