title: X-ray intensity fluctuation spectroscopy by heterodyne detection.
abstract: A straightforward way of measuring X-ray intensity fluctuation spectroscopy in a small-angle X-ray scattering configuration is demonstrated using heterodyne techniques. Two examples are presented: the Brownian motion of latex spheres in glycerol, and a Doppler velocity experiment demonstrating the motion and the relaxation of carbon-black-filled elastomers after uniaxial stretching. In the latter case the effects of mechanical relaxation can be separated from those of aggregate diffusion. The results suggest that the dynamics of these filled elastomers are similar to the universal features observed in disordered jammed systems.
authors.affiliation: LTPCM-ENSEEG, UMR-CNRS 5614, INPG/UJF, BP 75, 38402 St Martin d'Hères, France. flivet@ltpcm.inpg.fr
authors.forename: F
authors.initials: F
authors.lastname: Livet
authors.forename: F
authors.initials: F
authors.lastname: Bley
authors.forename: F
authors.initials: F
authors.lastname: Ehrburger-Dolle
authors.forename: I
authors.initials: I
authors.lastname: Morfin
authors.forename: E
authors.initials: E
authors.lastname: Geissler
authors.forename: M
authors.initials: M
authors.lastname: Sutton
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D008422:Materials Testing / Q000379:methods*; D008956:Models, Chemical; D008958:Models, Molecular; D053838:Scattering, Small Angle; D013052:Spectrometry, X-Ray Emission / Q000379:methods*; D014961:X-Ray Diffraction / Q000379:methods*