Survival of He+ ions during grazing scattering from a Ag(111) surface -: art. no. 037602

被引：57

作者：

Wethekam, S ^{[1
]}

Mertens, A ^{[1
]}

Winter, H ^{[1
]}

机构：

[1] Humboldt Univ, Inst Phys, D-10115 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.90.037602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

He+ ions as well as neutral He atoms with keV energies are scattered under a grazing angle of incidence from a clean and atomically flat Ag(111) surface. From a comparison of ion fractions observed after scattering of He+ ions and He atoms we find for energies below some keV small but defined fractions of ions that have survived the complete scattering event with the surface. This feature allows us to clear up the microscopic interaction scenario for Auger neutralization of He+ ions at a Ag(111) surface. The Auger neutralization rates are 2 to 3 orders of magnitude smaller than conventional rates derived from experiments for He+-metal systems and agree with recent calculations.

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页数：4

相关论文

共 23 条

[1] Finite time effect in the charge transfer process during an ion-metal surface collision [J].

Borisov, AG ;

Kazansky, AK ;

Gauyacq, JP .

PHYSICAL REVIEW LETTERS, 1998, 80 (09) :1996-1999

[2] Resonant charge transfer in grazing scattering of alkali-metal ions from an Al(111) surface [J].

Borisov, AG ;

TeilletBilly, D ;

Gauyacq, JP ;

Winter, H ;

Dierkes, G .

PHYSICAL REVIEW B, 1996, 54 (23) :17166-17174

[3] Theory of Auger neutralization and deexcitation of slow ions at metal surfaces [J].

Cazalilla, MA ;

Lorente, N ;

Muino, RD ;

Gauyacq, JP ;

Teillet-Billy, D ;

Echenique, PM .

PHYSICAL REVIEW B, 1998, 58 (20) :13991-14006

[4] Atomic resonances of hydrogen near aluminum surfaces: Adiabatic evolution of the ground state [J].

Deutscher, SA ;

Yang, XZ ;

Burgdorfer, J .

PHYSICAL REVIEW A, 1997, 55 (01) :466-478

[5] CHANNELING AND RELATED EFFECTS IN MOTION OF CHARGED-PARTICLES THROUGH CRYSTALS [J].

GEMMELL, DS .

REVIEWS OF MODERN PHYSICS, 1974, 46 (01) :129-227

[6] THEORY OF AUGER EJECTION OF ELECTRONS FROM METALS BY IONS [J].

HAGSTRUM, HD .

PHYSICAL REVIEW, 1954, 96 (02) :336-365

[7]

HAGSTRUM HD, 1978, ELECTRON ION SPECTRO, P273

[8] Auger transition rates for the neutralization of He+ ions in front of an aluminium surface [J].

Hecht, T ;

Winter, H ;

Borisov, AG .

SURFACE SCIENCE, 1998, 406 (1-3) :L607-L613

[9] Ionization of excited hydrogen atoms interacting with a metal surface under the influence of an external electric field [J].

Kurpick, P ;

Thumm, U ;

Wille, U .

PHYSICAL REVIEW A, 1998, 57 (03) :1920-1924

[10] Self-consistent LDA calculation in ion neutralization at metal surfaces [J].

Lorente, N ;

Monreal, R .

SURFACE SCIENCE, 1997, 370 (2-3) :324-338