Please use this identifier to cite or link to this item: https://physrep.ff.bg.ac.rs/handle/123456789/67
Title: Evaluation of electron capture distances of the Rydberg ion-surface interactions
Authors: Galijaš, Sava 
Poparić, Goran 
Keywords: charge exchange;highly charged ions;ion-surface neutralization;Rydberg state
Issue Date: 1-Feb-2019
Journal: Physica Scripta
Abstract: 
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 time-symmetrized quantum model, the state of a single active electron is described by two wave functions and , 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 over-the-barrier predictions.
URI: https://physrep.ff.bg.ac.rs/handle/123456789/67
ISSN: 0031-8949
DOI: 10.1088/1402-4896/aaf1ef
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