Resonances in the final Rydberg state population of multiply charged ions ArVIII, KrVIII, and XeVIII escaping solid surfaces

Galijaš, S.M.D.; Nedeljković, N. N.; Majkić, M.D.

doi:10.1016/j.susc.2011.01.008

Cited by 12 publications

(3 citation statements)

References 20 publications

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“…1 au [15] and for v ⊥ ≈ 1 au [16]. However, the scattering geometry that provides interesting new phenomena and insight into ion-surface interactions [2] has not yet been considered by the model.…”

Section: Introductionmentioning

confidence: 99%

Grazing incidence collisions of multiply charged ions on solid surfaces. Influence of the formation of intermediate Rydberg states

Nedeljković¹,

Majkić²,

Galijaš³

2012

J. Phys. B: At. Mol. Opt. Phys.

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We elaborate the quantum-mechanical analysis using the two-state vector model to investigate the formation of intermediate Rydberg states of multiply charged ions (core charge Z ≫ 1, principal quantum number nA ≫ 1) interacting with solid surfaces in the grazing incidence geometry. For the fixed initial and final states of the active electron, the two wavefunctions are used to describe the transitional electron state at the time t. Considering the projectile motion classically, the effect of projectile velocity is taken into account in accordance with Galilean invariance. The population probabilities of the intermediate Rydberg states are obtained in the analytical form, which enables an analysis of the localization and the selectivity of the process, for various ion–surface parameters. Ions ArZ+, KrZ+ and XeZ+ with Z ∈ [5, 35] interacting with Al-surface are considered as an example. The results are compared with the classical overbarrier predictions and the measured kinetic energy gain due to the image acceleration of the ions. It is demonstrated that the ionic velocity influences the ion–surface distance at which the formation of the particular intermediate Rydberg state is mainly localized, as well as the probability for this formation.

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Section: Introductionmentioning

confidence: 99%

Grazing incidence collisions of multiply charged ions on solid surfaces. Influence of the formation of intermediate Rydberg states

Nedeljković¹,

Majkić²,

Galijaš³

2012

J. Phys. B: At. Mol. Opt. Phys.

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“…[18], for » v 1 a.u. [19] and for  v 1 a.u. [20], as well as for the grazing incidence on a solid surface [21].…”

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confidence: 99%

Dynamics of the Rydberg state population of slow highly charged ions impinging a solid surface at arbitrary collision geometry

Nedeljković

Majkić²,

Božanić

et al. 2016

J. Phys. B: At. Mol. Opt. Phys.

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We consider the population dynamics of the intermediate Rydberg states of highly charged ionsinteracting with solid surfaces at arbitrary collision geometry. The recently developed resonant two-state vector model for the grazing incidence (2012 J. Phys. B: At. Mol. Opt. Phys. 45 215202) is extended to the quasi-resonant case and arbitrary angle of incidence. According to the model, the population probabilities depend both on the projectile parallel and perpendicular velocity components, in a complementary way. A cascade neutralization process for + Xe Z ions, for -= Z 15 45, interacting with a conductive-surface is considered by taking into account the population dynamics. For an arbitrary collision geometry and given range of ionic velocities, a micro-staircase model for the simultaneous calculation of the kinetic energy gain and the charge state of the ion in front of the surface is proposed. The relevance of the obtained results for the explanation of the formation of nanostructures on solid surfaces by slow highly charged ions for normal incidence geometry is briefly discussed.

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“…This kind of problem has been considered also within the framework of the TWF method [14] concerning the neutralization dynamics at low ionic velocities (v=1 a.u.). Further, the previous [15][16][17] and recent theoretical studies [18,19] of the one-electron capture into the Rydberg states of highly charged ions, performed in the intermediate velocity range (v≈1 a.u. ), were devoted to the final probability distributions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of electron capture distances of the Rydberg ion-surface interactions

Galijaš¹,

Poparić²

2019

Phys. Scr.

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The theoretical research of the electron capture dynamics is essential for describing a variety of ion-surface processes. We analyze the intermediate stages of the population of the Rydberg states (n A ?1, l A =0−2) of highly charged ions escaping metal surface in the normal geometry by using the two-wave-function (TWF) method. Within the framework of the proposed timesymmetrized quantum model, the state of a single active electron is described by two wave functions r t , 1 Y  ( ) and r t , 2 Y  ( ), evolving continuously and causally from a fixed initial state of the past (t=t in ) and from a fixed final state of the future (t=t fin ), respectively. A TWF method of the single active electron in the ion-surface system has been extended and applied to analyze the population of the highly charged Rydberg ions at intermediate ionic velocities (v≈1 a.u.). The obtained rates demonstrate that the neutralization is unstable near the surface, indicating that additional reionization process is very active and completely destroy previously populated states. At larger ion-surface distances the population process is stabilized and allows estimation of the neutralization distances. The results are compared with the coupled-angular-mode method as well as with the values calculated by using the first-order transition rates and the classical overthe-barrier predictions.

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Resonances in the final Rydberg state population of multiply charged ions ArVIII, KrVIII, and XeVIII escaping solid surfaces

Cited by 12 publications

References 20 publications

Grazing incidence collisions of multiply charged ions on solid surfaces. Influence of the formation of intermediate Rydberg states

Grazing incidence collisions of multiply charged ions on solid surfaces. Influence of the formation of intermediate Rydberg states

Dynamics of the Rydberg state population of slow highly charged ions impinging a solid surface at arbitrary collision geometry

Evaluation of electron capture distances of the Rydberg ion-surface interactions

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