Cluster Production in Free-Jet Expansions: Chlorobenzene Seeded in Ammonia

Abstract

Molecular beams collimated from the free jet expansion of a 200:1 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, (NH3)2, (NH3)4, C6H5Cl NH3, and C6H5Cl(NH3)2, 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.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1990
Accession Number
ADA224692

Entities

People

  • J. R. Grover
  • James F. Garvey
  • M. Todd Coolbaugh
  • W. J. Herron
  • William R. Peifer

Organizations

  • University at Buffalo

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Availability
  • Chemistry
  • Chlorobenzene
  • Classification
  • Condensation
  • Contracts
  • Dissociation
  • Intensity
  • Ionization
  • Measurement
  • Military Research
  • Molecular Beams
  • Photoionization
  • Production
  • Reactivities
  • Security
  • Tetramers

Fields of Study

  • Physics

Readers

  • Molecular Photonics/Laser Physics
  • Organic Chemistry