E.E.Alp; "Inelastic X-ray Scattering of Syn...", 9.12.2005,13:40, 2019

Faculty of Engineering and Natural Sciences
FENS SEMINARS

Inelastic X-ray Scattering of Synchrotron Radiaiton and its Applications in Biology and Geology and Materials Science(*)

Dr. Esen Ercan Alp
Advanced Photon Source, Argonne National Laboratory, Argonne Illinois

Abstract:
Inelastic X-ray scattering techniques with resolution power exceeding 104-107 are being used to study electronic and collective behavior of atoms, molecules, and polymeric chains in condensed materials in some unique ways. In this presentation, we will review several inelastic x-ray scattering techniques that require different optics. These include high energy resolution, momentum-resolved IXS to study phonon dispersion in crystals and liquid amorphous systems, momentum-resolved resonant IXS to study electronic excitations and band structure near Fermi level, x-ray Raman and x-ray emission spectroscopy, and nuclear resonant inelastic x-ray scattering for direct measurement of phonon density of states. Examples will be provided from porphyrin model compounds, hemoglobin and myoglobin, as well as DNA in solutions. Among the topics I would like to discuss are measurement of phonon density of states of materials under high pressure and temperature approaching to the conditions near the center of the earth, measurement of sound velocity and dynamic viscosity of liquid sapphire, boron and silicon, and phonon confinement in multilayers, measurement of valence and spin change under high pressure

(*) Work performed in collaboration with W. Sturhahn, H. Sinn, T. Toellner, J. Zhao, A. Alatas, A. Said, and H. Yavas, all of Argonne National Laboratory, and their collaborators.

This work is supported by US DOE-BES Materials Science under contract number W-31-109-ENG-38.

December 9, 2005, 13:40, FENS 2019