Interatomic Coulombic Decay: The Mechanism for Rapid Deexcitation of Hollow Atoms

被引：80

作者：

Wilhelm, Richard A. ^{[1
,2
]}

Gruber, Elisabeth ^{[1
]}

Schwestka, Janine ^{[1
]}

Kozubek, Roland ^{[3
,4
]}

Madeira, Teresa I. ^{[2
]}

Marques, Jose P. ^{[5
]}

Kobus, Jacek ^{[6
]}

Krasheninnikov, Arkady V. ^{[2
]}

Schleberger, Marika ^{[3
,4
]}

Aumayr, Friedrich ^{[1
]}

机构：

[1] TU Wien, Inst Appl Phys, Wiedner Hauptstr 8-10, A-1040 Vienna, Austria

[2] Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, Bautzner Landstr 400, D-01328 Dresden, Germany

[3] Univ Duisburg Essen, Fac Phys, Lotharstr 1, D-47048 Duisburg, Germany

[4] Univ Duisburg Essen, CENIDE, Lotharstr 1, D-47048 Duisburg, Germany

[5] Univ Lisbon, Fac Ciencias, BioISI Biosyst & Integrat Sci Inst, P-1749016 Lisbon, Portugal

[6] Nicolaus Copernicus Univ, Fac Phys Astron & Informat, Inst Phys, Grudziadzka 5, PL-87100 Torun, Poland

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 10期

基金：

奥地利科学基金会;

关键词：

HIGHLY-CHARGED IONS; TRANSITION ENERGIES; ELECTRON-EMISSION; FOCK PROGRAM; AUGER RATES; SURFACE; SLOW; EQUILIBRATION; MODEL; NEUTRALIZATION;

D O I：

10.1103/PhysRevLett.119.103401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The impact of a highly charged ion onto a solid gives rise to charge exchange between the ion and target atoms, so that a slow ion gets neutralized in the vicinity of the surface. Using highly charged Ar and Xe ions and the surface-only material graphene as a target, we show that the neutralization and deexcitation of the ions proceeds on a sub-10 fs time scale. We further demonstrate that a multiple Interatomic Coulombic Decay (ICD) model can describe the observed ultrafast deexcitation. Other deexcitation mechanisms involving nonradiative decay and quasimolecular orbital formation during the impact are not important, as follows from the comparison of our experimental data with the results of first-principles calculations. Our method also enables the estimation of ICD rates directly.

引用

页数：6