Ultrafast Laser Spectroscopy of Chemical Reactions
Ultrafast laser spectroscopy has extended reaction-dynamic studies into the picosecond and femtosecond time domain, allowing for experimental observations of transitory fragments that occur during collision or half-collision. This ability to observe molecular reactions allows real-time viewing of energy redistributions, measurements of state-to-state rates, and tests of microscopic statistical theories as prescribed by potential energy surface (PES) considerations. In this article, the focus is on unimolecular reactions. Recent advances in the studies of "oriented" bimolecular reactions and "transition states" of elementary reactions are also briefly considered.