The emission spectrum of SiN

Abstract

The emission spectrum of SiN has been reinvestigated under high resolution in the spectral region 3100–5600 Å. Besides the well known B2Σ+–X2Σ+, three new transitions have been analyzed, two 2Π–2Π and one 2Σ–2Π. These three transitions have a lower 2Π state in common which appears to be the lowest excited A2Π state. The B2Σ+–X2Σ+ transition has been reinvestigated and rotational perturbations have been found. The constants determined for the various electronic states are given.