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Updated: Dec 13, 2025

Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
A crossed molecular beam apparatus with multi-channel Rydberg tagging time-of-flight detection
Lulu Li1, Heilong Wang2, Zhirun Jiao2
1Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
Abstract:
We report a new crossed molecular beam apparatus with the H atom Rydberg tagging detection technique. The multi-channel detection scheme with 15 microchannel plate (MCP) detectors enables simultaneously accumulating time-of-flight spectra over a wide range of scattering angles (112°). The efficiency of data acquisition has been enhanced by an order of magnitude. The angular distribution of H atoms from photodissociation of CH4 at 121.6 nm was used for calibrating the detection efficiency of different MCP detectors. The differential cross section of the reaction F + H2 → HF + H at the collision of 6.9 meV was measured, demonstrating the feasibility and accuracy of this multi-channel detection method. This apparatus could be a powerful tool for investigating the dynamics of reactions at very low collision energy.
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