CRYSTAL STRESS DYNAMICS BY MEANS OF NANOSECOND TIME-RESOLVED X-RAY-DIFFRACTION

Time-resolved transient lattice deformation in Pt (111) crystal has be en directly observed from the shift of a nanosecond x-ray diffraction rocking curve. The development of a tabletop nanosecond x-ray system, which consists of an excimer laser, x-ray diode, and charge coupled de vice detector is described. With this system, we observed the time-dep endent strain distribution during the laser heating process in the bul k of a Pt (111) crystal. This method provides a means of relative low cost for the study of fast transient properties and structures of mate rials. (C) 1997 American Institute of Physics.