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

In English

Författare

  • Peter Sondhauss
  • Michael Harbst
  • J. Larsson
  • G.A. Naylor
  • A. Plech
  • K. Scheidt
  • Ola Synnergren
  • J.S. Wark
  • M. Wulf

Summary, in English

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)

Publiceringsår

2004

Språk

Engelska

Sidor

1387-1390

Publikation/Tidskrift/Serie

AIP Conference Proceedings

Volym

705

Dokumenttyp

Konferensbidrag

Förlag

American Institute of Physics (AIP)

Ämne

  • Physical Sciences
  • Atom and Molecular Physics and Optics
  • Natural Sciences

Nyckelord

  • 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

Conference name

Eighth International Conference on Synchrotron Radiation Instrumentation

Conference date

2003-08-25 - 2003-08-29

Conference place

San Francisco, CA, United States

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1551-7616
  • ISSN: 0094-243X
  • CODEN: APCPCS