Emission spectrum of the ν3 band of SF6 at 1780 °K

Abstract

The author measured the emission spectrum of the ν₃ band of SF₆ at 1780 °K in a shock tube. At this high temperature, the emission peaks at a frequency of 907 cm⁻¹ (11.02 μ); at room temperature, the band has a peak intensity at 948 cm⁻¹. Lyman and Nowak observed similar but proportionately smaller shifts of the spectral maximum to lower frequencies at temperatures between 400 and 800 °K. A knowledge of the high‐temperature spectral distribution of the ν₃ band is important for the design and interpretation of isotope separation experiments in which SF₆ is dissociated by selective multiphoton absorption of CO₂ laser photons.