THEORY OF ELECTRON-STIMULATED DESORPTION OF PHYSISORBED SPECIES THROUGH A STRONGLY BONDING EXCITED-STATE

被引：51

作者：

GORTEL, ZW ^{[1
]}

WIERZBICKI, A ^{[1
]}

机构：

[1] UNIV ALBERTA,INST THEORET PHYS,ADVADH BHATIA PHYS LAB,EDMONTON T6G 2J1,ALBERTA,CANADA

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.43.7487

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A model of the electron-stimulated desorption of physisorbed species is proposed in which the excited-state surface potential is due to a chemical rather than image force acting on the absorbed particle after the initial electron excitation is completed. The equilibrium positions of the excited- and the ground-state potentials nearly coincide and desorption is a purely quantum-mechanical effect. A one-dimensional model is systematically derived from the three-dimensional theory. The oscillatory structure of the resulting kinetic-energy distributions of the desorbing species is predicted in certain cases. It is demonstrated that, unlike in the commonly accepted Antoniewicz model, both the kinetic-energy distributions of the desorbing neutral particles and the total desorption yield calculated in the present model are consistent with the experimental data for Ar and N2O physisorbed on Ru(001).

引用

页码：7487 / 7501

页数：15

共 35 条

[11]

FEULNER P, 1983, SPRINGER SERIES CHEM, V24, P58

[12]

FEULNER P, 1983, SPRINGER SERIES CHEM, V24, P142

[13]

GADZUK JW, 1989, J CHEM PHYS, V91, P3175

[14]

GOERTEL ZW, 1990, SURF SCI LETT, V239, pL565

[15] THEORETICAL ASPECTS OF ELECTRONICALLY STIMULATED DESORPTION OF PHYSISORBED ATOMS [J].

GORTEL, ZW .

SURFACE SCIENCE, 1990, 231 (1-2) :193-212

[16] DESORPTION OF NEUTRALS BY TEMPORARY IONIZATION OF ATOMS AND MOLECULES PHYSISORBED ON A METAL-SURFACE - QUANTUM-MECHANICAL VERSUS CLASSICAL APPROACH [J].

GORTEL, ZW ;

TESHIMA, R ;

KREUZER, HJ .

PHYSICAL REVIEW B, 1988, 37 (07) :3183-3195

[17] ION NEUTRALIZATION IN STIMULATED DESORPTION [J].

GORTEL, ZW ;

TSUKADA, M .

PHYSICAL REVIEW B, 1989, 39 (16) :11259-11271

[18] ELECTRONICALLY STIMULATED DESORPTION FROM PHYSISORBED LAYERS ON METAL-SURFACES - KINETIC-ENERGY DISTRIBUTIONS OF DESORBED NEUTRAL ATOMS [J].

GORTEL, ZW ;

KREUZER, HJ ;

FEULNER, P ;

MENZEL, D .

PHYSICAL REVIEW B, 1987, 35 (17) :8951-8968

[19] TIME-DEPENDENT APPROACH TO SEMICLASSICAL DYNAMICS [J].

HELLER, EJ .

JOURNAL OF CHEMICAL PHYSICS, 1975, 62 (04) :1544-1555

[20] STIMULATED DESORPTION OF RARE-GAS NEUTRALS-CALCULATION OF YIELD AND KINETIC-ENERGY DISTRIBUTIONS [J].

HUBNER, W ;

BENNEMANN, KH .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1990, 78 (01) :131-136

← 1 2 3 4 →