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Search Publications by: David R Black (Fed)

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Displaying 51 - 75 of 111

X-Ray Topography to Characterize Surface Damage on CdZnTe Crystals

January 7, 2008
Author(s)
David R. Black, Joseph C. Woicik, Martine Duff, Douglas Hunter, Arnold Burger, Michael Groza
Synthetic CdZnTe or CZT crystals can be used for room temperature detection of ?-radiation. Structural/morphological heterogeneities within CZT, such as twinning, secondary phases (often referred to as inclusions or precipitates), and polycrystallinity can

Characterization of Spatial Heterogenieties in Detector Grade CdZnTe

December 4, 2007
Author(s)
Martine Duff, Douglas Hunter, Arnold Burger, Michael Groza, V Buliga, J Bradley, G Graham, Z Dai, N Teslich, David R. Black, H E. Burdette, A Lanzirotti
Synthetic Cd1-xZnxTe or CZT crystals are highly suitable for the room temperature-based spectroscopy of gamma radiation. Structural/morphological heterogeneities within CZT, such as secondary phases that are thought to consist of Te metal, can have

X-Ray Topography for Fractography of Single-Crystal Components

June 15, 2006
Author(s)
David R. Black, George D. Quinn
X-ray diffraction topography, which is sensitive to local strain and/or crystallographic orientation, provides a unique view of single-crystal samples both before and after fracture. It can find strength and performance limiting surface and subsurface

Using X-Ray Topography to Inspect Surfaces of Single-Crystal Components

July 1, 2005
Author(s)
David R. Black
X-ray diffraction topography, which is sensitive to local strain and/or crystallographic orientation, provides a unique view of the surface of single-crystal samples and can be used to nondestructively inspect for surface and subsurface damage. The

Array Ordering in Dendritic Crystals and the Influence on Crystal Perfection

December 1, 2004
Author(s)
R E. Napolitano, David R. Black
In the work reported here, several important issues regarding the role of the evolving dendritic structure in the generation of crystal defects are investigated. Industrially produced single-crystal castings are examined, and the dendritic arrays are