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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 |
Appears in Collections: | Journal Article |
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