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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Editor-in-Chief: Rademann, Klaus

IMPACT FACTOR 2018: 0.975
5-year IMPACT FACTOR: 1.021

CiteScore 2018: 1.20

SCImago Journal Rank (SJR) 2018: 0.327
Source Normalized Impact per Paper (SNIP) 2018: 0.391

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Volume 228, Issue 4-5


Probing Phase Transitions with Supersonic Beams – A Joint Experimental and Theoretical Study

Wolfgang Christen
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  • Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Str. 2, 12489 Berlin, Germany
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Published Online: 2014-03-21 | DOI: https://doi.org/10.1515/zpch-2014-0456


Pulsed, supersonic beams of propane have been investigated by mass-resolved time-of-flight measurements as a function of source pressure, covering sub- and supercritical expansion conditions. The experimental observation of a pronounced change in the terminal flow velocity is explained in terms of a thermodynamic model that is capable of describing the expansion of gases, liquids, and supercritical fluids; in particular, it allows the treatment of the vapor-liquid phase boundary and the critical point. Its major prediction is a distinct pressure dependence of the mean terminal flow velocity that is caused by condensation both in the stagnation reservoir and during the jet expansion. The agreement with experimental data is excellent.

Keywords: Supersonic Beams; Propane; Dense Fluids; Condensation; Time-of-Flight; Thermodynamics; Equation of State; Phase Transitions; Mass Spectrometry; Cluster

About the article

Accepted: 2013-12-17

Received: 2013-09-30

Published Online: 2014-03-21

Published in Print: 2014-05-28

Citation Information: Zeitschrift für Physikalische Chemie, Volume 228, Issue 4-5, Pages 369–385, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1515/zpch-2014-0456.

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