ELECTRON-STIMULATED DESORPTION OF ATOMIC OXYGEN FROM POLYCRYSTALLINE AG

被引：16

作者：

OUTLAW, RA ^{[1
]}

HOFLUND, GB ^{[1
]}

CORALLO, GR ^{[1
]}

机构：

[1] UNIV FLORIDA,DEPT CHEM ENGN,GAINESVILLE,FL 32611

来源：

APPLIED SURFACE SCIENCE | 1987年 / 28卷 / 03期

关键词：

CRYSTALS; -; Surfaces; OXYGEN; Desorption;

D O I：

10.1016/0169-4332(87)90125-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Emission of neutral oxygen atoms from an oxygen-charged polycrystalline Ag wire has been examined by using electron-stimulated desorption (ESD0 in conjunction with threshold ionization detection (appearance potential). A quadrupole mass spectrometer was used to detect the neutral oxygen atoms, but the ionizer was operated in the appearance potential mode to make it possible to distinguish the oxygen atoms from products formed by collision of the oxygen atoms with the walls. Loss of the reactive oxygen atoms was also minimized by enclosing the ESD chamber in fused silica. With a primary beam energy of 100 eV, the ESD cross section for oxygen atom desorption was found to be 7 multiplied by 10** minus ** 1**9 cm**2 at 100 degree C, and an ESD threshold was found to exist below 34 eV.

引用

页码：235 / 246

页数：12

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