PPT-Research opportunities in Powder Diffraction

Powder Diffraction Clarina R dela Cruz Quantum Condensed Matter Division Neutron Sciences Directorate Oak Ridge National Laboratory Neutron Wavelength Å Amorphous Materials Porous Media. Textbook sections 28-4 – 28-6. Physics 1161:. . . Lecture 21. Recall. Interference . (at least 2 coherent waves). Constructive (full wavelength difference). Destructive (½ wavelength difference). Physics 2415 Lecture 38. Michael Fowler, . UVa. Today’s Topics. Multi-slit interference. The diffraction grating: spectra. Waves and particles, more diffraction. Radio . astronomy. Light Intensity Pattern from Two Slits. Wave Optics. The wave nature of light is needed to explain various phenomena. Interference. Diffraction. The . particle nature of light was the basis for ray (geometric) . optics. Light waves interfere with each other much like mechanical waves do. Pg. 459 - 461. Properties of Waves. In order to study the properties of waves, a ripple tank is used. A shallow, glass-bottomed tank on left. ~2cm of water is added. Light from a source above the tank passes through the water and illuminates a screen on the table below. By Cade Grigsby. 1. What can X-ray diffraction tell us?. Structure. Bonds. Length. Type. Arrangement. Geometry of crystal. Picture. Electron density map. Diffraction. Angle. Intensity. 2. From X-Rays to Structure. Presented by. :. Panos. Economou. P.E. . Mediterranean Acoustics Research and Development. , Cyprus. . Panagiotis. . Charalampous. . P.E. Mediterranean Acoustics Research and Development, . Cyprus. Martin Centurion. Department of Physics and Astronomy. University of Nebraska – Lincoln. 1. Outline. 2. Diffraction from aligned molecules:. 3D molecular images with sub-Angstrom resolution. Imaging of transient structures: Molecules in intense laser fields.. Jonathan Cowen. Swagelok . Center for the Surface Analysis of Materials. Case School of Engineering. Case Western Reserve University. . October 27, 2014. . . Outline. X-ray Diffraction (XRD). History and background. History. 1895. Wilhelm Conrad R. ӧ. ntgen. discovered . X-rays. 1905 . Albert Einstein introduces the concept of photons (concept not accepted until 1922). 1913 . Max von . Laue, . Walter Friedrich . Diffraction of Light. Newton pointed . out in his 1704 book . Opticks. , that "Light is never known to follow crooked passages nor to bend into the shadow". . This concept is consistent with the particle theory, which proposes that light particles must always travel in straight lines.. Introduction I. History. 1895. Wilhelm Conrad R. ӧ. ntgen. discovered . X-rays. 1905 . Albert Einstein introduces the concept of photons (concept not accepted until 1922). 1913 . Max von . Kirigami. Nanocomposite. L. . Xu. , X. Wang. , Y. . Kim, T. C. Shyu, J. . Lyu. , N.A. . Kotov, . Kirigami. . Nanocomposites as Wide-Angle Diffraction Gratings, . ACS Nano, . 2016. 10 (6), 6156–6162.. Çiğdem . Konak . GÖKTEPE. , Nihat AKIN. University . of . Selcuk. , . Faculty. of . Agriculture. , . Department. of . Food. . Engineering. , Konya . TURKEY. Introduction. . . Boza. is a. . traditional. . CD/DVD drive. Image top. : . http://en.wikipedia.org/wiki/File:Dismdvd.. jpg. Image bottom: . http://. commons.wikimedia.org. /wiki/. File:DVD_querschnitt.svg. (. Creative Commons license). How does a CD/DVD store data?.