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Application of Laser-Enhanced Ionization to Flame Temperature Determination

Volume 45, Number 8 (Oct. 1991) Page 1340-1343

Su, King-Dow; Chen, Chung-Yuan; Lin, King-Chuen; Luh, Wei-Tzou


We have both theoretically and experimentally demonstrated that the laser-enhanced ionization (LEI) technique can be a simple, alternative method for flame temperature determination in an atmospheric air/acetylene flame. A three-level model of rate equations is developed to determine a flame temperature based upon the Boltzmann population of the ground fine structures of the analyte selected. A Ga sample was used for the test, and the LEI signal was measured with excitation to various intermediate states. The determined flame temperatures are very consistent with each other and also with those previously reported.