OBSERVATION OF PHOTON-STIMULATED DESORPTION FOLLOWING VALENCE-BAND EXCITATION OF ALKALI-HALIDES

被引：30

作者：

BUNTON, PH ^{[1
]}

HAGLUND, RF ^{[1
]}

LIU, D ^{[1
]}

TOLK, NH ^{[1
]}

机构：

[1] VANDERBILT UNIV,DEPT PHYS & ASTRON,NASHVILLE,TN 37235

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.45.4566

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report observations of photon-stimulated desorption of excited alkali-metal atoms following valence-band excitation of alkali halide crystals by tunable ultraviolet light. Excitation functions of excited Li and K atoms desorbed from LiF and KCl surfaces were measured in the photon-energy range 10-28 eV using a synchrotron light source. Simultaneous measurements of the secondary-electron yield demonstrate that excess metal on the surface is required for this process to occur; however, the temperature, time, and dose dependence of excited-atom and secondary-electron yields are uncorrelated. Possible models for the process of desorption stimulated by valence-band transitions are briefly considered.

引用

页码：4566 / 4571

页数：6

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