Abstract
Time-resolved photoelectron imaging with 90-nm vacuum-ultraviolet harmonic pulses is applied to
various targets from a basic atom to an organic molecule. We observed the quantum beat by the coherent
excitation of the multiple Rydberg states of Kr. The first real-time study on CO2 photodissociation
dynamics reveals two mechanisms with different dissociation rates. The spectroscopic observation of
ground-state product formation in the 1,3-cyclohexadiene ring-opening reaction resolves the discrepancy
between the reported values for the liquid and gas phases.
