David Townsend

TL;DR: Quasi-classical trajectory calculations performed on a global potential energy surface for H2CO suggest that this second channel represents an intramolecular hydrogen abstraction mechanism: One hydrogen atom explores large regions of the potentialEnergy surface before bonding with the second H atom, bypassing the saddle point entirely.

TL;DR: Gebhardt et al. as mentioned in this paper reported a new variation of the velocity map ion imaging method that allows the central section of the photofragment ion cloud to be recorded exclusively.

TL;DR: It is shown that a true minimum on the bright S2 electronic state is responsible for the first step that occurs on a femtosecond time scale, and it is suggested that subsequent barrier crossing to the minimal energy S2/S1 conical intersection isresponsible for the picosecond decay.

TL;DR: Dynamic Stark control (DSC) is experimentally demonstrated for a nonadiabatic photochemical reaction, showing substantial modification of reaction channel probabilities in the dissociation of IBr.

TL;DR: Time-resolved photoelectron spectroscopy reveals that, althoughadenine and 9-methyl adenine show almost identical timescales for the processes involved, the decay pathways are quite different and it is confirmed that in adanine at 267-nm excitation, the πσ* state plays a major role.