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2 results

  • 3 - Getting the Light to the Sample

  • D. Phil Woodruff, University of Warwick
  • Book:
    Synchrotron Radiation
    Published online:
    24 September 2021
    Print publication:
    07 October 2021, pp 70-101

  • Summary

    Chapter 3 describes the key components of the beamlines that deliver synchrotron radiation to experimental users. These include the use of mirrors and other focusing optical components to direct the radiation and monochromators for both the X-ray and vacuum ultraviolet spectral ranges.

  • Prospects for Vibrational-Mode EELS with High Spatial Resolution

  • R.F. Egerton
  • Journal:
    Microscopy and Microanalysis / Volume 20 / Issue 3 / June 2014
    Published online by Cambridge University Press:
    19 February 2014, pp. 658-663
    Print publication:
    June 2014

  • Taking advantage of previous measurements by Geiger and co-workers, we discuss the possibilities and problems of measuring vibrational modes of energy loss in a transmission electron microscope fitted with a monochromator and a high-resolution energy-loss spectrometer. The tail of the zero-loss peak is seen to be a major limitation, rather than its full-width at half-maximum. Because of the low oscillator strengths and small cross-sections involved, radiation damage will limit the spatial resolution if this technique is applied to organic specimens. Delocalization of the inelastic scattering may also be a limitation, if a dipole description of the scattering process is valid.