High resolution (3+1) REMPI and dissociation of acetone via 3p$ \leftarrow $n Rydberg transitions

Abstract

Measurements of multiphoton ionization and dissociation of acetone are reported in the wavelength range 490.0-510.0 nm at 1 nm intervals. To our knowledge there are no available results of (3+1) REMPI on acetone in this region. The experiments were performed using an Nd:YAG-OPO (optical parametric oscillator) laser system coupled to a time-of-flight mass spectrometer. The experimental results show two dissociation channels of the acetone ion, leading to the products (CH$_{3}$CO$^{ + })$ and (CH$_{3}^{ + })$, the channel CH$_{3}$COCH$_{3}^{ + } \to $ CH$_{3}$CO$^{ + }$ + CH$_{3}^{ }$ being the most favored. The acetone and acetyl ions are observed in the entire wavelength range investigated. Finally, the three-photon resonance multiphoton spectrum of the acetone 3p$ \leftarrow $n Rydberg transition is also reported.