Cluster Production in Free-Jet Expansions: Chlorobenzene Seeded in Ammonia
STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY
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Molecular beams collimated from the free jet expansion of a 2001 ammonia-chlorobenzene mixture were analyzed to obtain the relative intensities of the neutral clusters produced, and their dependence on nozzle pressure up to 1200 torr. A single-photon photionization method was used. All species observed, NH32, NH34, C6H5Cl NH3, and C6H5ClNH32, rise rapidly from low pressure but decrease slowly to higher pressures, contrary to present understanding. Possible reasons for this behavior are discussed. Jet expansions of ammonia readily induce condensation, so this phenomenon has long been used to make ammonia clusters for spectroscopic, thermochemical, and reactivity studies.
- Atomic and Molecular Physics and Spectroscopy