Production and Unimolecular Decay Rate of Internal Energy Selected Molecular Ions in a Laser Reflection Time-of-Flight Mass Spectrometer

Article abstract of DOI:10.1021/j150669a010

Monoenergetic, internal energy selected polyatomic ions are produced in a new two-laser pump-pump experiment.Low energetic parent ions produced with the first laser are further excited with the tunable second laser to a specified internal energy after extraction from the ion source.The metastable decay of energy-selected ions is monitored in a reflectron time-of-flight mass spectrometer, and as a first example, dissociation rates have been measured for two decay channels of C6H6⁺.The result clearly demonstrates directly that C-loss as well as H-loss channels are competing and originate from the same electronic state of the benzene cation.