Open AccessAN ELECTRON STIMULATED DESORPTION STUDY OF OXYGEN ON NICKEL
Author(s) -
Guo Yuan-heng,
Jia Cun-Li
Publication year - 1988
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.37.1103
Subject(s) - desorption , excitation , ionization , materials science , atomic physics , electron , nickel , auger , auger effect , analytical chemistry (journal) , oxygen , auger electron spectroscopy , electron ionization , ion , chemistry , physics , adsorption , metallurgy , organic chemistry , quantum mechanics , chromatography , nuclear physics
Electron Stimulated Desorption (BSD) of O+ from polycrystal Ni surface was studied. The ESD O+ was measured after the Ni sample was annealed at 700℃ for two hour and then exposed to 20-60 L O2 at room temperature and 500℃ respectively. Two kinds of ESD O+ had been found with different electron energy thresholds (29 eV and 23 eV). It was concluded that the two O+s were due to Auger induced desorption and the two thresholds corresponded to O(2s) electron ionization energy and excitation energy respectively. The process of excitation, ionization and de-excitation was also discussed.