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Search Publications by: Dale E. Newbury (Assoc)

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Displaying 76 - 100 of 112

Parallel Monte Carlo Simulation Using Desktop Computers

August 1, 1999
Author(s)
J H. Scott, Robert L. Myklebust, Dale Newbury
Monte Carlo simulation of electron scattering in solids has proven valuable to electron microscopists for many years. The electron trajectories, x-ray generation volumes, and scattered electron signals produced by these simulations are used in quantitative

Lowering the Limit of Detection in High Spatial Resolution Electron Beam Microanalysis With the Microcalorimeter Energy Dispersive X-Ray Spectrometer

June 1, 1999
Author(s)
Dale E. Newbury, David A. Wollman, Kent D. Irwin, Gene C. Hilton, John M. Martinis
Low-beam-energy x-ray microanalysis with the field-emission-gun scanning electron microscope suffers limitations due to physical factors of x-ray generation. Instrumental limitations are imposed by the poor resolution of the conventional semiconductor

Boron Substrates for the X-Ray Microanalysis of Particles

January 1, 1999
Author(s)
Eric S. Windsor, Dale E. Newbury, J Kessler
Boron is available commercially as high purity (> 0.995) crystalline pieces. Using metallographic sample preparation techniques, these crystalline pieces can be prepared to form substrates that are useful for the x-ray microanalysis of particles. Boron is

Castaing's Electron Microprobe and its Impact on Materials Science

January 1, 1999
Author(s)
Dale E. Newbury
A central theme of modern materials science has been the exploration of the relationship between the microstructure of a material and its macroscopic properties. The answer to many materials science questions requires knowledge of the specific composition

Trace Element Detection at Nanometer Scale Spatial Resolution

September 1, 1998
Author(s)
Dale E. Newbury
Trace elemental constituents present in materials at concentration levels below 0.01 mass fraction can exert significant control on important electronic, optical, chemical, and mechanical properties. Detecting and measuring trace constituents while

Microcalorimeter EDS Measurements of Chemical Shifts in Fe Compounds

July 1, 1998
Author(s)
David A. Wollman, Dale E. Newbury, Gene C. Hilton, Kent D. Irwin, L L. Dulcie, Norman F. Bergren, John M. Martinis
Chemical shifts result from changes in electron binding energies with the chemical environment of atoms. In x-ray spectra, chemical shifts lead to changes in x-ray peak positions, relative peak intensities, and peak shapes. These chemical bonding effects

Synthesis and Characterization of Fe-Co Alloy Nanoparticles

January 1, 1998
Author(s)
J H. Scott, Dale Newbury
FeCo nanoparticles are synthesized using a radio frequency (RF) plasma torch. These alloy nanoparticles ([approximate] 50 nm diameter) are nucleated in the gas phase from a vapor produced by evaporating much larger metal powder precursors ([approximate] 10