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Communication
Phys. Chem. Chem. Phys., 2006, 8, 4652 - 4654, DOI: 10.1039/b612324d
Doppler-free/Doppler-sliced ion imaging
Cunshun Huang, Sridhar A. Lahankar, Myung Hwa Kim, Bailin Zhang and Arthur G. Suits
We demonstrate a hybrid Doppler-free/Doppler-sliced ion imaging approach that is well-suited for detection of H or D atoms. The method relies on 2 + 1 resonant ionization with identical, nearly counterpropagating beams that are coplanar but directed at a small angle relative to the detector face. This results in Doppler selection of the velocity component along the time of flight axis but Doppler-free detection in the plane perpendicular to this axis. The results show high signal level and excellent slicing (
5%), yielding velocity resolution completely determined by cation recoil in the ionization step.
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