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Search Publications by: Zachary H. Levine (Fed)

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Displaying 101 - 125 of 267

Synthetic Incoherence Via Scanned Gaussian Beams

December 1, 2006
Author(s)
Zachary H. Levine
Tomography, in most formulations, requires an incoherent signal. For a conventional transmission electron microscope, the coherence of the beam often results in diffraction effects which limit the utility of a tilt series with conventional tomographic

Wake Fields in the Electron Gas Including Transverse Response

January 19, 2006
Author(s)
Eric J. Cockayne, Zachary H. Levine
Relativistic electrons have transverse electric fields comparable in magnitude to the longitudinal fields. We determine the relative effects of transverse and longitudinal fields of a moving point charge on the dielectric response of a uniform electron gas

Ab Initio Calculations of Mean Free Paths and Stopping Powers

January 2, 2006
Author(s)
A P. Sorini, J. Kas, J J. Rehr, M P. Prange, Zachary H. Levine
An approach is presented for theortical calculations of inelastic losses in solids over a broad energy range. The method is based on a many-pole model dielectric function, which is derived from ab initio calculations of optical constants using a real-space

The Boundary of X-Ray and Electron Tomography

January 3, 2005
Author(s)
Zachary H. Levine
Samples a few micrometers in total size offer a challenge to both x-ray and electron tomography. X-ray tomography originated imaging the human body with millimeter resolution, but the resolution has been reduced by over 7 orders of magnitude by the use of

Imaging Material Components of an Integrated Circuit Interconnect

January 1, 2004
Author(s)
Zachary H. Levine, Steven E. Grantham, D J. Paterson, I McNulty, I C. Noyan, T M. Levin
Two regions of interest on a copper/tungsten integrated circuit interconnect were imaged using two techniques: (a) the absorption spectrum was measured at 15 x-ray energies between 1687 eV and 1897 eV; and (b) the x-ray fluorescence spectrum was recorded