Multiphoton Ionization Of Molecules In Flames

Multiphoton ionization of molecules can be observed easily in both premixed and diffusion flame environments. Recent experiments on NO, PO, and butadiene show that this method is very sensitive for trace species detection and is well suited for making profile measurements. Multiphoton ionization complements laser-induced fluorescence techniques and now appears to be the best prospect for extending optical diagnostic studies to additional polyatomic molecules.