北京先进光源系列邀请报告（9-1）--Nuclear resonant x-ray scattering

报告人： Dr. Esen Ercan Alp

单 位：Advanced Photon Source, Argonne National Laboratory, Argonne Illinois 60439

时 间:  2011年12月12日10:00AM

地 点：同步辐射12号厅会议室

题 目：Nuclear resonant x-ray scattering

Abstract: This years mark the 50th anniversary of Nobel Prize given to R. Mössbauer for the discovery of the eponymous effect. For almost three decades after its discovery, Mössbauer spectroscopy was practiced using suitable radioactive parents decaying into the isotope of interest. For the last three decades, several groups around the world started research programs to make use of synchrotron radiation to replace the radioactive parent isotope as a source. These early efforts were amply rewarded with the arrival of third generation synchrotron radiation sources. Nuclear resonant x-ray scattering of synchrotron radiation is now a useful tool for investigating thermodynamic properties of organic and inorganic materials in various scientific disciplines including condensed matter physics, materials science, biophysics, geophysics and mineral physics. Today, it is possible to learn about phonon density of states under pressures exceeding megabar, and at temperatures as high as 3000 K. Interesting studies of iron proteins, model compounds like single crystal porphyrins, with different ligand substitutions, provides important clues to the mechanisms of enzymes. Study of metallic and network forming glasses or nanoparticles provide new insights to vibrational properties of complex systems.

Biographical sketch: Dr. Ercan Alp is a senior scientist at the Advanced Photon Source of the Argonne National Laboratory. He is also a visiting professor at University of Illinois at Urbana, and Northern Illinois University.

Dr. Alp received BSc and MSc degrees from the Middle East Technical University in Ankara, and PhD from Southern Illinois University. He is a member of Argonne National Laboratory since 1984. He was a post-doctoral researcher with Dr. G. Shenoy, and worked with the first group of scientists to prepare the scientific case for the Advanced Photon Source. He is known for his work in nuclear resonant x-ray spectroscopy using synchrotron radiation since 1980, when he spent a year in Hamburg as an IAEA fellow with Prof. E. Gerdau. He formed the inelastic x-ray scattering group at the APS, and he was responsible for the design and construction of the 3-ID beamline, dedicated to nuclear resonant and inelastic x-ray scattering, together with Drs. W. Sturhahn, T. Toellner, and H. Sinn. The discovery of the nuclear resonant inelastic x-ray scattering to phonon density of states is among the highlights of this period.

Dr. Alp, together with Dr. J. Hill of Brookhaven National Laboratory organized the first workshop on inelastic x-ray scattering that led to successful proposals to DOE and NSF. He served as the Managing Director of IXS-CDT project until its completion in 2007.

Dr. Alp was a member of Canadian Light Source Science Advisory Committee between 1999-2009. Together with Dr. H. Winick (SLAC), he chaired the first Scientific Committee for the SESAME project, and helped write the scientific case for a synchrotron source in the Middle East, organized workshops to develop a scientific user community. He continues to serve as a member of the Technical Committee.

Dr. Alp is the chair of the International Science Advisory Committee for the Turkish Accelerator Center. He participates in national and international panels, including Isotope Sub-committee of the DOE Nuclear Science Advisory Committee, many DOE and NIH panels, Beamline Advisory Committees for NSLS-II at Brookhaven and PETRA-III at DESY. He is recently elected to as the vice-chairman of the Forum for International Physics of the American Physical Society. He hosts international scientists and directs PhD theses for graduate students.

Dr. Alp is an elected US representative to the International Board of Applications of Mössbauer Effect (IBAME). Dr. Alp received University of Chicago Distinguished Scientific Performance Award in 1999. He has published over 200 papers, book chapters, and organized and chaired international conferences and workshops.