Sergey Yu. Pichugin

Detection of vibrationally excited O2 in O2(a1Δg)–I mixture

Abstract The vibrationally excited oxygen in the O 2 (a 1 Δ g )–I mixture by emission spectroscopy was detected. The analysis of a luminescence spectra of oxygen molecules on the O 2 (b 1 Σ g + , v = i )→O 2 (X 3 Σ g − , v ′ = i ) transitions ( i =0,1,2) has shown, that ≈22% of O 2 (b 1 Σ g + ) molecules are excited with v =1 and ≈10% with v =2. It is shown theoretically, that a mean number of vibrational quanta per one molecule in each of components O 2 (X 3 Σ g − ), O 2 (a 1 Δ g ) and O 2 (b 1 Σ g + ) is approximately equal because of fast EE energy exchange between oxygen molecules and reaches 0.3.