Document Type

Article

Date

8-18-2006

Embargo Period

2-4-2013

Keywords

Binary collisions; Cluster sizes; Kinetic equations

Disciplines

Chemistry

Description/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.

Additional Information

Copyright 2006 The Journal of Chemical Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and The Journal of Chemical Physics.

The article may be found at http://dx.doi.org/10.1063/1.2218837

Source

local input

Creative Commons License

Creative Commons Attribution 3.0 License
This work is licensed under a Creative Commons Attribution 3.0 License.

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Chemistry Commons

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