Note: Velocity map imaging the scattering plane of gas surface collisions.
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-d3photodissociation 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.
Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom.
D J
DJ
Hadden
Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom.
T M
TM
Messider
Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom.
J G
JG
Leng
Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom.
S J
SJ
Greaves