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Time resolved X-ray diffraction and non-thermal inelastic X-ray scattering

Författare:
  • Peter Sondhauss
  • Michael Harbst
  • J. Larsson
  • G.A. Naylor
  • A. Plech
  • K. Scheidt
  • Ola Synnergren
  • J.S. Wark
  • M. Wulf
Publiceringsår: 2004
Språk: Engelska
Sidor: 1387-1390
Publikation/Tidskrift/Serie: AIP Conference Proceedings
Volym: 705
Dokumenttyp: Konferensbidrag
Förlag: AIP

Sammanfattning

Atomic processes like e.g. molecular vibrations, chemical reactions or phase transitions happen on picosecond down to femtosecond time scales. Novel pulsed X-ray sources or alternatively ultrafast X-ray detectors allow the investigation of these processes in real time. A powerful tool for the investigation of the dynamics in crystalline materials is time resolved X-ray diffraction (TRXD). As an example the authors present the measurement of "phonon branch folding" in a GaSb/InAs superlattice by means of TRXD. In the second part we look forward to the near future of TRXD. X-ray scattering from coherent acoustic and optical phonons has recently become describable within the framework of dynamical diffraction theory. This theory provides the means for the detailed modeling of how various lattice dynamical processes manifest themselves in the diffracted X-ray signal. Simulations are presented showing the effects of coherent acoustic and optical phonons on the rocking curve of quartz (010)

Disputation

Nyckelord

  • Technology and Engineering
  • TRXD
  • GaSb/InAs superlattice
  • phonon branch folding
  • crystalline materials
  • ultrafast X-ray detectors
  • pulsed X-ray sources
  • time scales
  • phase transitions
  • chemical reactions
  • molecular vibrations
  • time resolved X-ray diffraction
  • nonthermal inelastic X-ray scattering
  • optical phonons
  • dynamical diffraction theory
  • lattice dynamical processes
  • diffracted X-ray signal
  • GaSb-InAs

Övriga

Eighth International Conference on Synchrotron Radiation Instrumentation
25-29 Aug. 2003
San Francisco, CA, USA
Published
Yes
  • ISSN: 0094-243X
  • CODEN: APCPCS

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