Electron emission from slow highly charged ions interacting with a metal surface

Title: Electron emission from slow highly charged ions interacting with a metal surface

Full Record
Other Related Research

Abstract

Recent progress in investigating electron emission from slowly highly charged ions approaching a metal surface is discussed. In particular, new informations on generation and decay of transient multiply excited hollow atoms'' developing during these process have been gained from measurement of the statistics of emitted electrons (ES). ES and precise total electron yields derived from the former have been measured for normal incidence of slow (impact velocity 1--15[center dot]10[sup 4] ms[sup [minus]1]) multicharged ions Nq[sup +] (q[le]6), Ne[sup q+](q[le]10), Ar[sup q+](q[ge]16), Kr[sup q+](q[le]10), Xe[sup q+](q[le]10) and I[ital q][sup +]([ital q][le]25) on clean polycrystalline gold. A classical over-barrier approach as recently introduced by Burgdoerfer [ital et] [ital al]. 1991 has been extended and successfully applied to model the measured impact-velocity dependences of total electron yields. In this way contributions from different electron emission mechanisms could be identified.

Authors:

Aumayr, F; Kurz, H; Toeglhofer, K; Winter, H ^[1]

Institut fuer Allgemeine Physik, TU Wien, Wiedner Haupstr. 8-10, A-1040 Wien (Austria)

Publication Date:: 1993-06-05

OSTI Identifier:: 5642192

Report Number(s):: CONF-920948-
Journal ID: ISSN 0094-243X; CODEN: APCPCS

Resource Type:: Conference

Journal Name:: AIP Conference Proceedings (American Institute of Physics); (United States)

Additional Journal Information:: Journal Volume: 274:1; Conference: 6. international conference on physics of highly charged ions, Manhattan, KS (United States), 28 Sep - 2 Oct 1992; Journal ID: ISSN 0094-243X

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; GOLD; ION COLLISIONS; MULTICHARGED IONS; ELECTRON EMISSION; ARGON IONS; EV RANGE 01-10; IODINE IONS; KRYPTON IONS; NEON IONS; NITROGEN IONS; POLYCRYSTALS; XENON IONS; CHARGED PARTICLES; COLLISIONS; CRYSTALS; ELEMENTS; EMISSION; ENERGY RANGE; EV RANGE; IONS; METALS; TRANSITION ELEMENTS; 665300* - Interactions Between Beams & Condensed Matter- (1992-)

Citation Formats


                    Aumayr, F, Kurz, H, Toeglhofer, K, and Winter, H. Electron emission from slow highly charged ions interacting with a metal surface.  United States: N. p., 1993. 
        Web.

Copy to clipboard


                    Aumayr, F, Kurz, H, Toeglhofer, K, & Winter, H. Electron emission from slow highly charged ions interacting with a metal surface.  United States.

Copy to clipboard


                    Aumayr, F, Kurz, H, Toeglhofer, K, and Winter, H. Sat .  
        "Electron emission from slow highly charged ions interacting with a metal surface".  United States.

Copy to clipboard


                    
@article{osti_5642192,

  title        = {Electron emission from slow highly charged ions interacting with a metal surface},

  author       = {Aumayr, F and Kurz, H and Toeglhofer, K and Winter, H},

  abstractNote = {Recent progress in investigating electron emission from slowly highly charged ions approaching a metal surface is discussed. In particular, new informations on generation and decay of transient multiply excited hollow atoms'' developing during these process have been gained from measurement of the statistics of emitted electrons (ES). ES and precise total electron yields derived from the former have been measured for normal incidence of slow (impact velocity 1--15[center dot]10[sup 4] ms[sup [minus]1]) multicharged ions Nq[sup +] (q[le]6), Ne[sup q+](q[le]10), Ar[sup q+](q[ge]16), Kr[sup q+](q[le]10), Xe[sup q+](q[le]10) and I[ital q][sup +]([ital q][le]25) on clean polycrystalline gold. A classical over-barrier approach as recently introduced by Burgdoerfer [ital et] [ital al]. 1991 has been extended and successfully applied to model the measured impact-velocity dependences of total electron yields. In this way contributions from different electron emission mechanisms could be identified.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/5642192},
  journal      = {AIP Conference Proceedings (American Institute of Physics); (United States)},

  issn         = {0094-243X},

  number       = ,

  volume       = 274:1,

  place        = {United States},

  year         = {1993},

  month        = {6}

}

Copy to clipboard

Conference:

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Neutralization of slow multicharged ions at a clean gold surface: Electron-emission statistics

Journal Article Kurz, H ; Aumayr, F ; Lemell, C ; ... - Physical Review A; (United States)

Emission of slow electrons ([ital E][sub [ital e]][le]60 eV) induced by impact of slow multicharged ions (impact velocity [ital v][sub [ital p]][le]2[times]10[sup 5] m/s) onto an atomically clean, polycrystalline gold surface has been studied both experimentally and by numerical simulation, based on the resulting electron-emission statistics. The projectile ions (N[sup [ital q]+], [ital q]=5,6; Ne[sup [ital q]+], [ital q]=5--10; Ar[sup [ital q]+], [ital q]=5--16; Kr[sup [ital q]+], [ital q]=5--10; Xe[sup [ital q]+], [ital q]=6,8,10; I[sup [ital q]+], [ital q]=16,20,23,25) have been extracted from a recoil ion source pumped by the GSI UNILAC heavy-ion accelerator in Darmstadt, Germany. We discuss themore »« less
https://doi.org/10.1103/PhysRevA.48.2192
Neutralization of slow multicharged ions at a clean gold surface: Total electron yields

Journal Article Kurz, H ; Aumayr, F ; Lemell, C ; ... - Physical Review A; (United States)

Total slow-electron ([ital E][sub [ital e]][le]60 eV) yields as derived from measured electron-emission statistics are presented for impact of various slow ([ital v][sub [ital p]][le]10[sup 5] m/s) multicharged ions (N[sup 5+],N[sup 6+],Ne[sup 5+]--Ne[sup 10+], Ar[sup 5+]--Ar[sup 16+], Kr[sup 5+]--Kr[sup 10+], Xe[sup 6+],Xe[sup 8+],Xe[sup 10+], and I[sup 16+],I[sup 20+],I[sup 23+],I[sup 25+]) on atomically clean polycrystalline gold. The experimental data can successfully be modeled by classical over-barrier-type calculations, in which way three different electron-emission processes have been identified, i.e., autoionization of the transiently neutralized projectile ( hollow atom'') on its approach toward the surface, promotion into vacuum of electrons captured by themore »« less
https://doi.org/10.1103/PhysRevA.48.2182
Emission of electrons from a clean gold surface induced by slow, very highly charged ions at the image charge acceleration limit

Journal Article Aumayr, F ; Kurz, H ; Schneider, D ; ... - Physical Review Letters; (United States)

Total low-energy electron yields for the normal incidence interaction of slow, very highly charged ions ([sup 136]Xe[sup [ital q]+], 21[le][ital q][le]51; [sup 232]Th[sup [ital q]+], 51[le][ital q][le]80) with a clean gold surface have been determined from the related measured electron emission statistics. The projectile impact energies could be reduced down to the image charge acceleration limit. The electron emission yield was found to increase proportionally with the increasing projectile charge state in all cases studied, suggesting no saturation in the ability of the Au target to provide necessary electrons within the above surface interaction time (e.g., about 280 electrons/projectile formore »« less
https://doi.org/10.1103/PhysRevLett.71.1943
Electron emission and image-charge acceleration for the impact of very highly charged ions on clean gold

Journal Article Kurz, H ; Aumayr, F ; Winter, H ; ... - Physical Review A; (United States)

We present total yields for emission of slow ([ital E][sub [ital e]][le]50 eV) electrons due to the impact of slow ([ital v][sub [ital p]][le]5[times]10[sup 5] m/s) highly charged ions [Ar[sup [ital q]+] ([ital q][le]18), Xe[sup [ital q]+] ([ital q][le]51), and Th[sup [ital q]+] ([ital q][le]80)] on clean polycrystalline gold. The highly charged ions were produced in the Lawrence Livermore National Laboratory electron-beam ion trap; electron yields have been derived from the respective measured electron emission statistics. The experimental data support a currently accepted scenario for multicharged ion-induced electron emission, which is largely based on a classical over-barrier model. In particular,more »« less
https://doi.org/10.1103/PhysRevA.49.4693
Interaction of slow highly charged ions with surfaces

Conference Aumayr, F

A review will be presented on recent investigations concerning the interaction of slow ({le} 10{sup 6} m/s) ions in high charge states approaching a clean metal surface. Detailed information on the generation and decay of transiently formed multiply excited {open_quotes}hollow atoms{close_quotes} can be gained from the measurement of total yields and energy distributions of emitted electrons and, in particular, from the electron emission statistics. By comparing measured results with model calculations based on a recently extended classical over-barrier approach, different sources for the observed electron emission can be identified: autoionisation of the multiply excited hollow atoms on their way towardmore »« less

Similar Records