Europhys. Lett.
Volume 48, Number 5, December 1999
Page(s) 580 - 586
Section Interdisciplinary physics and related areas of science and technology
Published online 01 September 2002
DOI: 10.1209/epl/i1999-00523-2

Europhys. Lett, 48 (5), pp. 580-586 (1999)

The strong-collision model for activated rate processes

A. I. Shushin

Institute of Chemical Physics, Russian Academy of Sciences
117977, GSP-1, Kosygin str. 4, Moscow, Russia

(received 2 June 1999; accepted in final form 30 September 1999)

PACS. 82.20Db - Statistical theories (including transition state).
PACS. 82.20Mj - Nonequilibrium kinetics.
PACS. 61.20Lc - Time-dependent properties; relaxation.


The strong-collision model (SCM) for friction (energy dissipation) in condensed phase processes is considered. SCM assumes the instantaneous relaxation of the velocity distribution of a probe particle in the medium to the thermal distribution after each collision with surrounding particles. SCM is applied to the analysis of the kinetics of the passage over a parabolic barrier. Simple formulas for the passing rate (both exact and approximate) are derived and analyzed in detail.


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