Electron capture and loss processes in the interaction of hydrogen, oxygen, and fluorine atoms and negative ions with a MgO(100) surface

被引：64

作者：

Ustaze, S ^{[1
]}

Verucchi, R ^{[1
]}

Lacombe, S ^{[1
]}

Guillemot, L ^{[1
]}

Esaulov, VA ^{[1
]}

机构：

[1] UNIV PARIS 11, COLLIS ATOM & MOL LAB, UNITE RECH ASSOCIEE CNRS, ORSAY, FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.79.3526

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A study of electron capture and loss processes during the scattering of H, O, and F atoms and anions on a MgO(100) surface is described. Large fractions of anions in the scattering of atoms are observed, indicating the existence of an efficient electron capture process. This is ascribed to a nonresonant, localized charge exchange mechanism between an atom and a MgO lattice oxygen anion. This charge transfer becomes possible because of anion level shifts in the Madelung field. The existence of an electron loss channel is demonstrated using incident anions and is ascribed to loss to the conduction band or Mg cations.

引用

页码：3526 / 3529

页数：4

共 29 条

[11]

KING DA, 1988, CHEM PHYSICS SOLID S

[12] SPATIAL-DISTRIBUTION OF SECONDARY SI AND AI IONS IN THEIR EXCITED AND GROUND-STATES [J].

LEDYANKIN, DV ;

URAZGILDIN, IF ;

YURASOVA, VE .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1990, 48 (1-4) :585-588

[13] CHARGE-EXCHANGE IN ATOM SURFACE COLLISIONS [J].

LOS, J ;

GEERLINGS, JJC .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1990, 190 (03) :133-190

[14] Electron capture and loss in the scattering of oxygen atoms and ions on Mg, Al and Ag surfaces [J].

Maazouz, M ;

Guillemot, L ;

Schlatholter, T ;

Ustaze, S ;

Esaulov, VA .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1997, 125 (1-4) :283-287

[15] Electron capture processes on oxidized surfaces: H- formation on Mg/O-2 and Al/O-2 [J].

Maazouz, M ;

Guillemot, L ;

Lacombe, S ;

Esaulov, VA .

PHYSICAL REVIEW LETTERS, 1996, 77 (20) :4265-4268

[16]

MAAZOUZ M, 1977, PHYS REV B, V55, P13869

[17] Ammonia adsorption on MgO(100): A density functional theory study [J].

Nakajima, Y ;

Doren, DJ .

JOURNAL OF CHEMICAL PHYSICS, 1996, 105 (17) :7753-7762

[18]

NOGUERA C, 1996, PHYSICS CHEM OXIDE S

[19] Comparing ab initio computed energetics with thermal experiments in surface science: CO/MgO(001) [J].

Nygren, MA ;

Pettersson, LGM .

JOURNAL OF CHEMICAL PHYSICS, 1996, 105 (20) :9339-9348

[20] CHARGE-TRANSFER AT LARGE INTERNUCLEAR DISTANCES - APPLICATION TO ASYMMETRIC ALKALI-ION ALKALI-ATOM SYSTEMS [J].

OLSON, RE .

PHYSICAL REVIEW A, 1972, 6 (05) :1822-&

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