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AN ELECTRON STIMULATED DESORPTION STUDY OF OXYGEN ON NICKEL

JIA CUN-LI GUO YUAN-HENG

AN ELECTRON STIMULATED DESORPTION STUDY OF OXYGEN ON NICKEL

JIA CUN-LI, GUO YUAN-HENG
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  • Received Date:  14 September 1987
  • Published Online:  06 July 2005

AN ELECTRON STIMULATED DESORPTION STUDY OF OXYGEN ON NICKEL

  • 1. (1)北京大学物理系,青岛大学物理系; (2)中国科学院北京真空物理实验室

Abstract: 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.

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