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 B 2 Σ + –X 2 Σ + , three new transitions have been analyzed, two 2 Π– 2 Π and one 2 Σ– 2 Π. These three transitions have a lower 2 Π state in common which appears to be the lowest excited A 2 Π state. The B 2 Σ + –X 2 Σ + transition has been reinvestigated and rotational perturbations have been found. The constants determined for the various electronic states are given.