Application of scaling and kinetic equations to helium cluster size distributions: Homogeneous nucleation of a nearly ideal gas

Joseph Chaiken, J. Goodisman, Oleg Kornilov, J. Peter Toennies

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A previously published model of homogeneous nucleation [Villarica et al., J. Chem. Phys. 98, 4610 (1993)] based on the Smoluchowski [Phys. Z. 17, 557 (1916)] equations is used to simulate the experimentally measured size distributions of 4He clusters produced in free jet expansions. The model includes only binary collisions and does not consider evaporative effects, so that binary reactive collisions are rate limiting for formation of all cluster sizes despite the need for stabilization of nascent clusters. The model represents these data very well, accounting in some cases for nearly four orders of magnitude in variation in abundance over cluster sizes ranging up to nearly 100 atoms. The success of the model may be due to particularities of 4He clusters, i.e., their very low coalescence exothermicity, and to the low temperature of 6.7 K at which the data were collected.

Original languageEnglish (US)
Article number074305
JournalThe Journal of Chemical Physics
Volume125
Issue number7
DOIs
StatePublished - 2006

Fingerprint

Helium
ideal gas
kinetic equations
Nucleation
Gases
helium
nucleation
scaling
Kinetics
Coalescence
collision rates
free jets
Stabilization
coalescing
Atoms
stabilization
collisions
expansion
atoms
Temperature

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Application of scaling and kinetic equations to helium cluster size distributions : Homogeneous nucleation of a nearly ideal gas. / Chaiken, Joseph; Goodisman, J.; Kornilov, Oleg; Toennies, J. Peter.

In: The Journal of Chemical Physics, Vol. 125, No. 7, 074305, 2006.

Research output: Contribution to journalArticle

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