Study on resonance enhanced multiphoton ionization and fragmentation of 2-butanone

Resonance Enhanced Multiphoton Ionization (REMPI) dissociation process of 2 - butanone was studied using a tunable dye laser. It was found that in the wavelength range of 428 similar to 448nm (3 + 1) multiphoton ionization pr ocess via 4p and 4d Rydberg state occured. In addition, the dissociation me chanism of 2 - butanone parent ion and the source of fragmental ions were i nvestigated in detail with "ladder switching" model, and the hydrogen rearr angement and redistribution of change were found during the dissociation pr ocess of 2 - butanone parent ion.