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Search Publications by: Dale E. Newbury (Assoc)

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Displaying 1 - 25 of 216

The hazard of UV-induced oxidation to solar-viewing spacecraft optics

March 2, 2023
Author(s)
Charles S. Tarrio, Robert F. Berg, Thomas B. Lucatorto, Dale E. Newbury, Nicholas Ritchie, Andrew Jones, Frank Eparvier
The two most prevalent outgas contaminants on satellites are organic molecules and water vapor. Adsorbed organic molecules can degrade a solar-viewing instrument when they are cracked by ultraviolet radiation (UV) and become a light-absorbing layer of

Manganese-Enhanced Magnetic Resonance Microscopy of Mineralization

October 12, 2021
Author(s)
I Chesnick, T Todorov, J M. Centeno, Dale Newbury, John A. Small, K Potter
Paramagnetic manganese (II) can be employed as a calcium surrogate to enhance the sensitivity of the magnetic resonance microscopy (MRM) technique to the processing of calcium during the bone formation process. At high doses, osteoblasts can take up

Quantitative EELS of Alloy Nanoparticles

October 12, 2021
Author(s)
J H. Scott, Dale Newbury
Quantitative electron energy-loss spectroscopy (EELS) is used to characterize the chemical composition of Fe-Co alloy nanoparticles. A 300-keV analytical microscope equipped with an imaging energy filter is used to acquire parallel EELS spectra from metal

Quantitative Electron-Excited X-ray Microanalysis with Low Energy L-Peaks

August 12, 2021
Author(s)
Dale E. Newbury, Nicholas Ritchie
Quantitative electron-excited X-ray microanalysis that follows the standards-based intensity ratio method produces accurate results and an analytical total near unity based upon extensive testing on known materials. This paper investigates a significant

Proposal: Let's Develop a Community Consensus K-ratio Database

August 30, 2020
Author(s)
Nicholas Ritchie, Dale E. Newbury, John Fournelle, Aurelien Moy, Heather Lowers, Anette von der Handt, Paul Carpenter, Emma Bullock, John Donovan
The electron excited microanalysis community is increasingly running into the limitations of its ability to derive accurate an composition from measured x-ray intensities. Many of these limitations could be mitigated if the standard matrix correction

Solidification of Ni-Re Peritectic Alloys

February 4, 2019
Author(s)
William J. Boettinger, Dale E. Newbury, Nicholas W. Ritchie, Maureen E. Williams, Ursula R. Kattner, Eric Lass, Kil-Won Moon, Michael B. Katz
Differential thermal analysis (DTA) and microstructural and microprobe measurements of DTA and as-cast Ni-Re alloys with compositions between 0.20 and 0.44 mass fraction Re provide information to resolve differences in previously published Ni-Re phase

An Iterative Qualitative - Quantitative Sequential Analysis Strategy for Electron-Excited X-ray Microanalysis with Energy Dispersive Spectrometry: Finding the Unexpected Needles in the Peak Overlap Haystack

June 20, 2018
Author(s)
Dale E. Newbury, Nicholas Ritchie
When analyzing an unknown by electron-excited energy dispersive X-ray spectrometry with the entire periodic table possibly in play, how does the analyst discover minor and trace constituents when their peaks are overwhelmed by the intensity of an