Photodissociation of the acetone cation at 355 nm using the velocity imaging technique

摘要: Photodissociation of acetone cations, CH3COCH3+, at 355 nm has been studied by means the ion velocity imaging technique. Acetone cations are produced via direct photoionization a supersonic beam 118 generated frequency tripling laser. Only acetyl cation, CH3CO+, could be detected as dissociation product in time-of-flight mass spectrometer. The signal depends upon fifth power laser energy, while third power. This suggests that fragment is two-photon absorption photons cation. total translational energy distribution and angular cation were derived from 2D images CH3CO+ for reaction CH3COCH3++2hν355 nm→CH3CO++CH3*. methyl radicals two electronically excited states, Rydberg 3s 1 2A1′ valence 1 2A″ states. anisotropy parameter β sh...