Abstract
The ability of gas-surface dynamics studies to resolve the velocity distribution of the scattered species in the 2D scattering plane has been limited by technical capabilities and only a few different approaches have been explored in recent years. In comparison, gas-phase scattering studies have been transformed by the near ubiquitous use of velocity map imaging. We describe an innovative means of introducing a dielectric surface within the electric field of a typical velocity map imaging experiment. The retention of optimum velocity mapping conditions was validated by measurements of iodomethane-d3 photodissociation and SIMION calculations. To demonstrate the system's capabilities, the velocity distributions of ammonia molecules scattered from a polytetrafluoroethylene surface have been measured for multiple product rotational states.
Highlights
The ability of gas-surface dynamics studies to resolve the velocity distribution of the scattered species in the 2D scattering plane has been limited by technical capabilities and only a few different approaches have been explored in recent years
We describe an innovative means of introducing a dielectric surface within the electric field of a typical velocity map imaging experiment
It has been noted by several authors1–4 that the study of gas-surface scattering (SS) could be revolutionized by using a combination of resonance enhanced multiphoton ionization (REMPI)5 and velocity map ion imaging (VMI)
Summary
The ability of gas-surface dynamics studies to resolve the velocity distribution of the scattered species in the 2D scattering plane has been limited by technical capabilities and only a few different approaches have been explored in recent years. J. Greavesa) Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom (Received 13 June 2016; accepted 9 October 2016; published online 24 October 2016)
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