Identification of Resonant, Two-Electron, and Inter-Atomic Features in K and L(sub23) NEXAFS Spectra

Abstract

Experimental Cl K NEXAFS spectra for Cl-hydrated in H20, and on passivated Al electrodes (below and above the pitting potential) have widely different spectral line shapes. Experimental K-and L23-edge NEXAFS data for the alkali halides and rare gas solids are compared with FEFF6 calculated results to optimize code input parameters, test code validity, and identify many-body features in these model systems. Differences are shown to arise from many-body shake-up and charge-transfer excitations. Although relatively small in the model spectra, the latter interatomic excitations are believed to be primarily responsible for the different Cl-line shapes on the passivated Al electrodes. NEXAFS, Shake satellites, X-Ray absorption, Alkali halides, Rare gases.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1994
Accession Number
ADA285374

Entities

People

  • David E. Ramaker
  • H. Sambe
  • Qian Xiao
  • W. E. O'grady

Organizations

  • George Washington University

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Absorption
  • Artificial Satellites
  • Band Gaps
  • Charge Transfer
  • Chemistry
  • Electrodes
  • Electronic Mail
  • Electrons
  • Excitation
  • Experimental Data
  • Ground State
  • Halides
  • Military Research
  • Plane Waves
  • Spectra
  • United States Government
  • X Rays

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Microelectronics
  • Space