Specifics of the stochastic ionization of a Rydberg collision complex with Förster resonance

Zakharov, M. Yu.; Безуглов, Н. Н.; Klyucharev, A. N.; Matveev, A. A.; Бетеров, И. И.; Dulieu, Olivier

doi:10.1134/s1990793111040117

Cited by 5 publications

(8 citation statements)

References 15 publications

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“…It can be seen that, in the vicinity of the FR, the radiative lifetimes of the Rydberg states can vary significantly (by orders of magnitude). Similar effects manifest themselves, and in collision Rydberg complexes [25,43], which will be discussed in the following sections. vary significantly (by orders of magnitude).…”

Section: Blocking Of the Spectral Transitions Double Stark (Förster)mentioning

confidence: 62%

“…It can be seen that, in the 4 < n * < 28 range of effective quantum numbers, the data of the experiment and the stochastic theory (solid curves) agree with each other (although measurements have large error bars), whereas calculations using the traditional DSMJ model [43][44][45] (dashed curves) significantly underestimate the corresponding results, particularly for the lower values of n.…”

Section: Assotiative Ionization Rate Constantsmentioning

confidence: 67%

“…[67]. Full curves exhibit results of theory [60], accounting for stochastic diffusion effects, while dotted curves correspond to calculations in the frame of regular DSMJ model [43][44][45]. Associative ionization rate constants for Na*(nl) + Na(3s) collisions in a single beam [53] (frames (a,b)) and in two orthogonal crossed beams [66] (frames (c,d)), T = 600 K. Figure 12 shows the results of more recent experiments [53,66] on AI rate constants measurements, the authors of which took into account the effects of free electrons escaping due to atoms photoionization by black body radiation.…”

Section: Assotiative Ionization Rate Constantsmentioning

confidence: 97%

“…The concept of an effective orbital number l e f is widely used in calculating the probability of radiative transitions in alkali atoms [42]. It allows, in particular, for describing the FR between l and l − 1 atomic series [43] by selecting the parameter α = α l,l−1 :…”

Section: Blocking Of the Spectral Transitions Double Stark (Förster)mentioning

confidence: 99%

“…In Section 2.2, a significant decrease in the probabilities of Rydberg states radiative decay in Förster resonance (FR) conditions was demonstrated, which is due to the suppression of dipole matrix elements. Since the widths of the nonlinear resonances δε, as shown in [43,52], are directly related to the probabilities of microwave transitions in the excited atom, the blocking of the latter means the blocking of the development of dynamic chaos. The possibility of "controlling" the development of global chaos in the Rydberg diatomic cluster, using the double Stark resonance (or FR) mechanism, was considered in [40,43].…”

Section: Features Of Diffusional Ionization Under Conditions Of Förstmentioning

confidence: 99%

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Dynamic Instability of Rydberg Atomic Complexes

Dimitrijević

Srećković

Zalam

et al. 2019

Atoms

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Atoms and molecules in highly excited (Rydberg) states have a number of unique characteristics due to the strong dependence of their properties on the values of principal quantum numbers. The paper discusses the results of an investigation of collisional Rydberg complexes specific features, resulting in the development of dynamic chaos and the accompanying diffusion autoionization processes. It is shown (experiment and theory) that, in subthermal low energies, the global chaotic regime that evolved in quasimolecular systems leads to significant changes in the Rydberg gases radiation/ionization kinetics. The effect of Förster resonance on the width of the fluorescence spectra and stochastic ionization processes in Rydberg systems is also discussed.

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Section: Blocking Of the Spectral Transitions Double Stark (Förster)mentioning

confidence: 62%

Section: Assotiative Ionization Rate Constantsmentioning

confidence: 67%

Section: Assotiative Ionization Rate Constantsmentioning

confidence: 97%

Section: Blocking Of the Spectral Transitions Double Stark (Förster)mentioning

confidence: 99%

Section: Features Of Diffusional Ionization Under Conditions Of Förstmentioning

confidence: 99%

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Dynamic Instability of Rydberg Atomic Complexes

Dimitrijević

Srećković

Zalam

et al. 2019

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The Chemi-Ionization Processes in Slow Collisions of Rydberg Atoms with Ground State Atoms: Mechanism and Applications

et al. 2012

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In this paper the history and the current state of research of the chemi-ionization processes in atom-Rydberg atom collisions is presented. The principal assumptions of the model of such processes based on the dipole resonance mechanism, as well as the problems of stochastic ionization in atom-Rydberg atom collisions, are exposed. The properties of the collision kinetics in atom beams of various types used in contemporary experimentations are briefly described. Results of the calculation of the chemi-ionization rate coefficients are given and discussed for the range of the principal quantum number values 5 ≤ n ≤ 25. The role of the chemi-ionization processes in astrophysical and laboratory low-temperature plasmas, and the contemporary methods of their investigation are described. Also the directions of further research of chemi-ionization processes are discussed in this paper.

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Dynamics Resonances in Atomic States of Astrophysical Relevance

Arefieff¹,

Miculis²,

Безуглов³

et al. 2015

J Astrophys Astron

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Ionized geocosmic media parameters in a thermal and a subthermal range of energy have a number of unique features. The photoresonance plasma that is formed by optical excitation of the lowest excited (resonance) atomic states is one example of conversion of radiation energy into electrical one. Since spontaneous fluorescence of excited atoms is probabilistic, the description of the radiating quantized system evolution along with photons energy transfer in a cold atoms medium, should include elements of stochastic dynamics. Finally, the chaotic dynamics of a weakly bound Rydberg electron over a grid of the energy levels diagram of a quasi-molecular Rydberg complex provides an excitation migration of the electron forward to the ionization continuum. This work aims at discussing the specific features of the dynamic resonances formalism in the description of processes involving Rydberg states of an excited atom, including features in the fluorescence spectrum partially caused by the quantum defect control due to the presence of statistic electromagnetic fields

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Specifics of the stochastic ionization of a Rydberg collision complex with Förster resonance

Cited by 5 publications

References 15 publications

Dynamic Instability of Rydberg Atomic Complexes

Dynamic Instability of Rydberg Atomic Complexes

The Chemi-Ionization Processes in Slow Collisions of Rydberg Atoms with Ground State Atoms: Mechanism and Applications

Dynamics Resonances in Atomic States of Astrophysical Relevance

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