Calculations of O 2 absorption and fluorescence at elevated temperatures for a broadband argon—fluoride laser source at 193 nm

Abstract

Calculations have been made of O 2 absorption and fluorescence in the Schumann-Runge B 3Σ - u ← X 3Σ - g band system for excitation by a broadband argon fluoride excimer laser at 193 nm. Results are presented for line strengths, spectral absorption coefficients, relative fluorescence spectra, total fluorescence and integrated absorption coefficients. The calculations have been performed for 300, 500, 1000, 1500 and 2000 K, a range of temperatures typically found in combustion flows. The absorption coefficients and fluorescence yields found are large enough to encourage use of argon fluoride lasers for O 2 measurements in a variety of flows.