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Velocity Distributions in Molecular Beams from Nozzle Sources
Abstract
The velocity distributions in molecular beams of argon produced by the Kantrowitz-Grey supersonic nozzle technique have been investigated using a time-of-flight method. It is shown that the transition from continuum to free molecular flow in free jet expansion limits the minimum width of the velocity distribution which may be obtained. The Mach number corresponding to the axial velocity distribution of the expanding gas approaches a limit which varies inversely with the two-fifths power of the Knudsen number at the nozzle. With argon at room temperature the narrowest velocity distribution obtained corresponds to a Mach number of 23 (90% of the molecules within 5.4% of the most probable velocity).
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Cites
Advances in atomic and molecular physics
Bates, D. R., & Bederson, B. B. (1965) · CERN Document Server (European Organization for Nuclear Research) · Cited by 1,143
Cited by
Structural properties of nanoclusters: Energetic, thermodynamic, and kinetic effects
Baletto, F., & Ferrando, R. (2005) · Reviews of Modern Physics · doi:10.1103/revmodphys.77.371 · Cited by 1,811
Electronic Shell Structure and Metal Clusters
de Heer, W. A., Knight, W. D., Chou, M. Y., & Cohen, M. L. (1987) · Solid State Physics · doi:10.1016/s0081-1947(08)60691-8 · Cited by 438
Clustering of water on hydrated protons in a supersonic free jet expansion
Searcy, J. Q., & Fenn, J. B. (1974) · The Journal of Chemical Physics · doi:10.1063/1.1681876 · Cited by 305
Self-citation
Metadata
- Authors
- Anderson, J. B., & Fenn, J. B.
- Venue
- The Physics of Fluids
- Publisher
- AIP Publishing
- Published
- 1965-05-01
- Volume
- 8
- Issue
- 5
- Pages
- 780-787
- ISSN
- 0031-9171 (ISSN-L)
- OpenAlex
- W2017763616
- Cited by
- 458
- References
- 1
- FWCI
- 9.07
- Type
- journal article
- Language
- en
- Open access
- closed
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- Anderson, J. B., & Fenn, J. B. (1965). Velocity Distributions in Molecular Beams from Nozzle Sources. The Physics of Fluids. https://doi.org/10.1063/1.1761320
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