Visible Emission Systems in Silicon Monoiodide

Abstract

The optical spectroscopic study of the Ar afterglow reaction of SiI4 has led to the observa tion of two visible emission systems of SiI. A new red-degraded emission in the 430-480 nm region was assigned to the system by comparison with absorption spect rum. The system was detected in the 490-560 nm region . The intensity was so strong that several new bands could be identified in longer wavelengths . The exci tation source of SiI emission was concluded to be metastable Ara+ions .