Towards a new (Q, t) regime by time-resolved X-ray diffraction: Ultra-sound excited crystals as an example

¹ European Synchrotron Radiation Facility, F-38043 Grenoble Cedex, France
² Institut Max von Laue Paul Langevin, F-38042 Grenoble Cedex, France
³ Institut für Mineralogie der Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
⁴ Institut für Experimentalphysik 4, Ruhr Universität Bochum, D-44780 Bochum, Germany

Corresponding author: liss@esrf.fr

Received: 28 July 1997
Accepted: 2 October 1997

Abstract

Time-resolved diffraction patterns down to a sub-nanosecond scale obtained with a high-resolution diffractometer for high-energies X-rays on ultrasonically excited samples are presented. The time resolution gives direct insight into the purity of the excited sound waves and reveals the density of states for the lattice parameter at any point of time in a MHz oscillation period. The combination of the time resolution with the momentum transfer Q accessible by the high-energy diffractometer gives access to a unique regime in (Q, t) space.