Dissociation of systems of nonlinearly coupled particles in external fields according to a diffusion model

I. N. Antonov^a, A. G. Lavkin<sup>b

a</sup> Yuri Gagarin State Technical University of Saratov
^b Saratov State University

Abstract: We have studied a diffusion model of the excitation and decay of a system of coupled particles in an external field. Using the example of a hydrogen chloride molecule, it is shown that electron oscillations exhibit chaotization that leads to diffusion ionization (or dissociation) in a sufficiently strong microwave field. The dependence of the rate of diffusion ionization on the radiation intensity and ellipticity of polarization and on the energy of excitation of the vibrational and rotational degrees of freedom has been numerically simulated. It is established that the ionization time significantly exceeds the period of electron motion over the undisturbed orbit.

Received: 05.11.2014

 English version: Technical Physics Letters, 2015, 41:4, 386–388

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