Experiments concerning electron capture and loss to the continuum and convoy electron production by highly ionized projectiles in the 0.7 - 8.5-MeV/u range transversing the rare gases, polycrystalline solids, and axial channels in gold

Breinig, M.; Elston, S. B.; Huldt, S.; Liljeby, L.; Vane, C. R.; Berry, S.; Glass, Gary A.; Schauer, Martin; Sellin, I. A.; Alton, G. D.; Datz, S.; Overbury, Steven H.; Laubert, R.; Suter, M.

doi:10.1103/physreva.25.3015

Cited by 185 publications

(30 citation statements)

References 61 publications

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“…These repetitive peaks of C-K electrons are found to follow the n −3 law, as illustrated in Fig. 2, as has been pointed out by Breinig et al [16]. Taking into account that some very closely located C-K peaks appear as a combined peak, such as n = 11 of (a') and n = 11 of (b"), well-separated peaks and appropriate division of combined peak heights lead us to the n −3 law.…”

Section: Resultssupporting

confidence: 62%

High resolution zero degree electron spectroscopy of argon ions through carbon foil

Imai¹,

Sataka²,

Kawatsura³

et al. 2006

Braz. J. Phys.

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Electrons emitted from high Rydberg states formed by penetration of 2.0 MeV/u Ar 6,13,14,15+ ions through C-foil targets of various thicknesses (4.0 -20 µg/cm 2 ) have been measured with high resolution utilizing zero-degree electron spectroscopy. Intense series of Coster-Kronig peaks due to Ar 14+ 1s 2 2p( 2 P 3/2,1/2 )nl1s 2 2s( 2 S 1/2 )εl and Ar 13+ 1s 2 2s2p( 3 P 2,1,0 )nl -1s 2 2s 2 ( 1 S 0 )εl transitions, in which the principal quantum number, n, starts at 10 and increases with increasing peak energy, have been observed for every combination of initial charge state and foil thickness, and quite a few number of other peaks remain unassigned in the electron energy region investigated. Intensities of each series of Coster-Kronig electron peaks follow the n −3 law. The mean charge states after the foil penetration have been found to be the same within 10% uncertainty and the total intensity of the Coster-Kronig transitions including Ar 15+ 1s 2 2p( 2 P) and Ar 14+ 1s 2 2s2p( 3 P) cores have also been found to remain constant for all the collision systems investigated. The total Ar 15+ 1s 2 2p( 2 P) population derived from n = 10 transition peaks is found to be almost the same as those of Ar 14+ 1s 2 2s2p( 3 P), which is in contrast to the ratio of Ar 15+ to Ar 14+ fractions measured downstream the foil.

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Section: Resultssupporting

confidence: 62%

High resolution zero degree electron spectroscopy of argon ions through carbon foil

Imai¹,

Sataka²,

Kawatsura³

et al. 2006

Braz. J. Phys.

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“…This gives first evidence to exclude, for the interpretation of our data, models based on kinetic electron 14 or convoy electron emission 15 and points towards electron emission in terms of various XVV Auger transitions (see Fig. 3).…”

mentioning

confidence: 99%

Angle- and energy-resolved, spin-polarized electron emission spectroscopy to study surface magnetic and electronic properties

1990

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We report on a new technique, spin-polarized electron emission spectroscopy. Using grazing-angle, surface scattering of H +and He+ ions at Ni(llO), we find that the angle-resolved energy distribution of emitted spin-polarized electrons is significantly different from that of electron-induced secondary (cascade) electrons and exhibits a series of characteristic "peaks" (including element-specific Auger electrons). We obtain characteristic, spin-dependent information on the surface electronic structure of NiOIO) and on atom-surface charge-transfer processes. PACS numbers: 79.20.Rf, 61.14.Rq, 75.20.En Recently, broad and intense scientific interest has focused on the two-dimensional (20) physical properties of surfaces of thin films and bulk materials. 1 • 2 Grazing-ion surface reflection is a powerful means to probe these properties, in particular, the electronic, magnetic, and even chemical properties of surfaces. At grazing angles of incidence, ions do not penetrate a flat surface, they are specularly reflected and, therefore, probe the topmost surface layer. This is profitably exploited in electroncapture spectroscopy (ECS), 3 • 4 where capture of spinpolarized electrons by grazing-angle surface reflected deuterons is used to obtain information on surface magnetic behavior such as long-and short-ranged magnetic order, critical behavior, and 20 phase transitions. 5 In recent years, a series of further spin-sensitive techniques has been devised and most successfully applied to study surface magnetism, 2 • 6 but none of them fulfills all the requirements of simultaneously being extremely surface, spin, and element specific.In this Letter, we report on a new and powerful method, energy-and angle-resolved, spin-polarized electron emission spectroscopy (SPEES), where grazingangle ion-surface reflection is used to induce the emission of spin-polarized electrons from the topmost layer of magnetic surfaces. Specifically the capability to detect element-specific, spin-polarized Auger electrons makes SPEES a very unique spectroscopy. Two other techniques are remotely related to SPEES: Electroninduced, spin-polarized Auger-electron spectroscopy (SPAES) successfully developed by Landolt, Allenspach, and Mauri 7 and ion neutralization spectroscopy 8 (INS) pioneered by Hagstrum and used to probe local electron density of states outside the surface.An important aspect of SPEES is that it not only allows us to study the electronic, magnetic, and chemical structure of surfaces, but also enables us to unravel the physics of electronic charge-exchange processes occurring during particle surface interaction, which, at present, receives a great deal of attention. 9 -11 We employ the "spin" of emitted electrons as an additional "label" to identify various processes occurring in ion-surface interaction at grazing incidence. Selecting, for the incoming ions, grazing angles of incidence significantly helps to avoid cascade effects caused by energetic secondary electrons or ions and reveals important details about these processes.I...

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“…The electron velocity distribution is peaked for v electron " ^Droiectile anc * assumes a CUS P shape which is notably enhanced for I'electronl < l^oiectilel ^ t ' 1e ^o u^omb attraction between the electron and ionized target atom. All available experimental data to date has been with non-hydrogenic targets [6,7], which prevented direct comparison of experiment and theory since the most nearly tractable theoretical formulations consider hydrogenic targets. However, an ECC spectrum has now been obtained for 12 MeV C 6+ incident on atomic hydrogen inside a dissociation over heated by electron impact [8,9].…”

Section: Introductionmentioning

confidence: 99%

Electron capture to the continuum from atomic hydrogen

Glass

Engar²,

Berry³

et al. 1985

Nuclear Instruments and Methods in Physics Research Section B:

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Experiments concerning electron capture and loss to the continuum and convoy electron production by highly ionized projectiles in the 0.7 - 8.5-MeV/u range transversing the rare gases, polycrystalline solids, and axial channels in gold

Cited by 185 publications

References 61 publications

High resolution zero degree electron spectroscopy of argon ions through carbon foil

High resolution zero degree electron spectroscopy of argon ions through carbon foil

Angle- and energy-resolved, spin-polarized electron emission spectroscopy to study surface magnetic and electronic properties

Electron capture to the continuum from atomic hydrogen

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