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Study of the oxidation of W(110) by full-solid-angle photoelectron diffraction with chemical state and time resolution

Technical Report ·
DOI:https://doi.org/10.2172/603677· OSTI ID:603677
 [1];  [2];  [1];  [1];  [3];  [1];  [4];  [3];  [3];  [5]; ;  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Davis, CA (United States). Dept. of Physics
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Davis, CA (United States). Dept. of Physics; ICMM-CSIC, Madrid (Spain)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Osaka Univ. (Japan). Dept. of Materials Physics
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); La Trobe Univ., Bundoora (Australia)
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The brightness of third-generation synchrotron radiation from beamline 9.3.2 at the Advanced Light Source has been combined with the high-intensities and energy resolutions possible with its advanced photoelectron spectrometer/diffractometer experimental station in order to study the time dependence of the oxidation of the W(110) surface. This has been done via chemical-state-resolved core-level photoelectron spectroscopy and diffraction. This system has been studied previously by other methods such as LEED and STM, but several questions remain as to the basic kinetics of oxidation and the precise adsorption structures involved. By studying the decay and growth with time of various peaks in the W 4f{sub 7/2} photoelectron spectra, it should be possible to draw quantitative conclusions concerning the reaction kinetics involved. The authors have also measured full-solid-angle photoelectron diffraction patterns for the two oxygen-induced W states, and these should permit fully defining the different structures involved in this oxidation process.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC03-76SF00098
OSTI ID:
603677
Report Number(s):
LBNL--39981; ON: DE97007345; CNN: Contract N00014-94-1-0162
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
CHEMICAL REACTION KINETICS
ELECTRON DIFFRACTION
MONOCRYSTALS
OXIDATION
PHOTOELECTRON SPECTROSCOPY
SURFACE PROPERTIES
TIME DEPENDENCE
TUNGSTEN