The Ultraviolet Spectrum of Ammonia. II. The Rotational Structure of Some Bands in the Schumann Region

Abstract

Seven bands of ammonia between 1620 and 1450A have been photographed in absorption with a dispersion of 1.3A/mm. These are the 0,2-0,8 bands of the second electronic state above the normal. Each band has one $P$ and one $R$ branch, and a broad intense line as a $Q$ branch. Within the limit of observational errors, which were large in this region, the moment of inertia $A^{\prime }$ is only slightly larger than $A^{\prime \prime }$, and $C^{\prime }$ is about equal to $C^{\prime \prime }$, so that the dimensions are not greatly changed in the excited state.