High Temperature Absorption Coefficients of O2, NH3, and H2O for Broadband ArF Excimer Laser Radiation.

摘要

Experimentally-determined absorption coefficients for broadband excimer radiation at 193 millimeter are presented at temperatures up to 3500 Kelvin for Oxygen gas, Ammonia, and Water. These values were determined in high-purity shock tube, either by measuring excimer pulse fractional absorptions or by measuring photolysis-product yields. Correlations between absorption coefficients and vibrational populations of the absorbing species are discussed. Using these absorption coefficients, a prediction can be made of the amount of Oxygen, Amino group, Hydroxyl radical, and H produced in shock-tube excimer-photolysis experiments. This direct production of radicals is attractive for reaction-kinetics studies in high-temperature gases. Keywords: Absorption; High temperature; Excimer laser; Oxygen; Ammonia; Water vapor; Reprints; Inorganic chemistry. (JG)