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Search Publications by: Terrence J. Jach (Fed)

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Displaying 26 - 42 of 42

Bulk and Surface Evidence for the Long Range Spatial Modulation of X-Ray Absorption in the AlPdMn Quasicrystal at Bragg Incidence

January 1, 2001
Author(s)
G Cappello, A Dechelette, F Schmithusen, S Decossas, J Chevrier, F Comin, V Formoso, M. De Boissieu, Terrence J. Jach, R. Colella, T Lograsso, C Jenks, D W. Delaney
An X-ray standing waves experiment was performed at the ID32 beam line of the ESRF on an Al-PD-Mn quasicrystal with the X-ray beam at normal incidence. The X-ray photoemission core levels for each element were recorded to probe the surface. The drain

Quasicrystal Element Correlations From X-Ray Standing Waves

January 1, 2001
Author(s)
Terrence J. Jach
X-ray standing waves associated with dynamical diffraction in perfect crystals are also present during diffraction in high-quality quasicrystals. The fluorescence observed from quasicrystals while scanning the rocking curve of a particular Bragg reflection

Fast Imaging of Hard X-Rays With a Laboratory Microscope

July 1, 2000
Author(s)
A S. Bakulin, S M. Durbin, Terrence J. Jach, J Pedulla
An improved x-ray microscope with a fully electronic CCD detector system has been constructed that allows improved laboratory-based microstructural investigations of materials with hard x-rays. It uses the Kirkpatrick-Baez multilayer mirror design to form

Dynamical Diffraction and X-Ray Standing Waves from Atomic Planes Normal in a Twofold Symmetry Axis of the Quasicrystal A1PdMn

April 1, 1999
Author(s)
Terrence J. Jach, Yanbao Zhang, R. Colella, M. De Boissieu, M. Boudard, A. I. Goldman, T Lograsso, D W. Delaney, S. Kycia
We have observed dynamical diffraction in the [024024] and[046046] reflections of the icosahedral quasicrystal A1PdMn in the back-reflection geometry (θ B = 90 ). The x-ray fluorescence from the Al and Pd atoms exhibits strong standing wave behavior

Polycapillary X-Ray Optic Spectral Gain and Transmission

April 1, 1999
Author(s)
J E. Gormley, Eric B. Steel, Q Xiao, Terrence J. Jach
Polycapillary x-ray optics are gaining increased attention as their transmission characteristics and manufacturing difficulties are better understood. This paper reports experimental results obtained with an optic that was designed for use with both Mo KΑ

Use of Kirkpatrick-Baez Multilayer Optics for X-Ring Fluorescence Imaging

July 1, 1998
Author(s)
A S. Bakulin, S M. Durbin, C Liu, J Erdmann, A T. Macrander, Terrence J. Jach
We discuss the possibilities for using Kirkpatrick-Baez (K-B) multilayer elements to directly image the fluorescence distribution from a specimen under x-ray illumination. X-ray fluorescence would be collected by K-B elements close in contrast to the use

Structural Phase Transitions on Nickel at the Curie Temperature

March 16, 1981
Author(s)
J Hamilton, Terrence J. Jach
It is observed that a reversible step period rearrangement on clean nickel single-crystal surfaces occurs in the immediate vicinity of the Curie temperature. Reversible carbon segregation is observed on the same crystal surfaces below the Curie point. The