Radiative electron capture by bare and H-like Si and Cl ions using the channeling technique and the associated solid-state effect

Tribedi, Lokesh C.; Nanal, V.; Kurup, M.B.; Prasad, K. Krishna; Tandon, P.N.

doi:10.1103/physreva.51.1312

Cited by 19 publications

(27 citation statements)

References 41 publications

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“…However, the present observations are in qualitative agreement with the enhancement of the REC x-ray yields and the REC energy shifts due to solid-state effects in heavy ion channeling, with similar [15,16] and will also be useful to calculate the projectile energy loss in fullerenes since it depends on the plasma oscillation.…”

supporting

confidence: 83%

“…In ion-solid collisions, the collective electronic response is known to give rise to a dynamic screening and a wake of electron density fluctuations trailing the ions [13,14]. Such a solidstate effect on REC (radiative electron capture) [15,16], resonant coherent excitation [17,18], and convoy electron production (see [13]) has been identified. The Stark splitting due to the wakefield has also been observed in the Ly x-ray emission yields in e-capture by bare ions in thin solid targets [19,20].…”

mentioning

confidence: 99%

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Effect of Collective Response on Electron Capture and Excitation in Collisions of Highly Charged Ions with Fullerenes

et al. 2003

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Projectile deexcitation Lyman x-ray emission following electron capture and K excitation has been studied in collisions of bare and Li-like sulphur ions (of energy 110 MeV) with fullerenes (C(60)/C(70)) and different gaseous targets. The intensity ratios of different Lyman x-ray lines in collisions with fullerenes are found to be substantially lower than those for the gas targets, both for capture and excitation. This has been explained in terms of a model based on "solidlike" effect, namely, wakefield induced stark mixing of the excited states populated via electron capture or K excitation: a collective phenomenon of plasmon excitation in the fullerenes under the influence of heavy, highly charged ions.

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supporting

confidence: 83%

mentioning

confidence: 99%

Effect of Collective Response on Electron Capture and Excitation in Collisions of Highly Charged Ions with Fullerenes

et al. 2003

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“…For instance, our former measurements of K-REC with 60 MeV/u Kr 36+ ions (Z p v 0 /v= 1.1) under channeling conditions agree perfectly with the Stobbe formula (with an absolute uncertainty of ± 10%) [6]. Tribedi et al [5] used the linear response scaling [2] of the local electron density to explain the excess of REC cross sections in channeling relative to gas targets. We prefer to consider an increase of electron density instead of an increase of cross sections, which are defined for a single ion-electron (or ion-atom) collision.…”

Section: Resultssupporting

confidence: 68%

Electron gas polarization effect induced by heavy H-like ions of moderate velocities channeled in a silicon crystal

Testa

Dauvergne

Bräuning‐Demian³

et al. 2006

Nuclear Instruments and Methods in Physics Research Section B:

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International audienceWe report on the observation of a strong perturbation of the electron gas induced by 20 MeV/u U91+ ions and 13 MeV/u Pb81+ ions channeled in silicon crystals. This collective response (wake effect) induces a shift of the continuum energy level by more than 100 eV, which is observed by means of radiative electron capture into the K- and L-shells of the projectiles. We also observe an increase of the REC probability by 20–50% relative to the probability in a non-perturbed electron gas. The energy shift is in agreement with calculations using the linear response theory, whereas the local electron density enhancement is much smaller than predicted by the same model. This shows that, for the small values of the adiabaticity parameter achieved in our experiments, the density fluctuations are not strongly localized in the vicinity of the heavy ions

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“…In contrast to pure ion-atom collisions as in gaseous targets, the ion-solid interaction allows one to study the dynamics of atomic collisions in the presence of neighboring atoms. So called "solid-state effects" on the collision are still not fully understood [1][2][3][4][5][6]. Besides the interaction of the ion with the bulk material, it has been shown that for slow, highly charged ions the interaction with the surface plays an important role (see, e.g., [7] for an overview).…”

Section: (Received 2 May 2000)mentioning

confidence: 99%

Strong Evidence for Enhanced Multiple Electron Capture from Surfaces in46MeV/uPb81+Collisi

Bräuning

Mokler²,

Liesen³

et al. 2001

Phys. Rev. Lett.

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Strong evidence has been found for enhanced multiple electron capture into 46 MeV/u Pb81+ with a significant contribution from the entrance surface of thin carbon foils. Capture of up to five electrons has been observed. The multiple electron capture yield is found to increase with decreasing target thickness for thin targets. A simple model describing the data and showing the importance of capture from surfaces is discussed. Further evidence is found for a pronounced asymmetry between electron capture at the entrance and the exit surfaces. Absolute yields for multiple electron capture and projectile ionization are presented. The experimental total cross sections for single capture and ionization agree well with theory.

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Radiative electron capture by bare and H-like Si and Cl ions using the channeling technique and the associated solid-state effect

Cited by 19 publications

References 41 publications

Effect of Collective Response on Electron Capture and Excitation in Collisions of Highly Charged Ions with Fullerenes

Effect of Collective Response on Electron Capture and Excitation in Collisions of Highly Charged Ions with Fullerenes

Electron gas polarization effect induced by heavy H-like ions of moderate velocities channeled in a silicon crystal

Strong Evidence for Enhanced Multiple Electron Capture from Surfaces in46MeV/uPb81+Collisi

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