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Search Publications by: Donald Windover (Fed)

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Displaying 1 - 25 of 57

Powder X-ray structural analysis and band gap measurements for (CaxSr2-x)MnWO6 (x = 0.25, 0.5, 0.75, 1.5, 1.75).

June 1, 2022
Author(s)
Winnie Wong-Ng, YuQi Yang, Yu-Cheng Lan, GuangYao Liu, Amrit Kafle, Weifang Liu, Jie Hou, Donald Windover, Qingzhen Huang, Sergiy Krylyuk, James A. Kaduk
The structure, powder diffraction patterns and band gap measurements of a series of manganese- and tungsten-containing alkaline-earth double perovskites (CaxSr2-x)MnWO6 (x=0.25, 0.5, 0.75, 1.5, 1.75) have been investigated. Powder X-ray diffraction

Metrological Tools for the Reference Materials and Reference Instruments of the NIST Material Measurement Laboratory

September 16, 2021
Author(s)
Carlos R. Beauchamp, Johanna Camara, Jennifer Carney, Steven J. Choquette, Kenneth D. Cole, Paul C. DeRose, David L. Duewer, Michael Epstein, Margaret Kline, Katrice Lippa, Enrico Lucon, John L. Molloy, Michael Nelson, Karen W. Phinney, Maria Polakoski, Antonio Possolo, Lane C. Sander, John E. Schiel, Katherine E. Sharpless, Michael R. Winchester, Donald Windover
The National Institute of Standards and Technology (NIST), formerly the National Bureau of Standards, was established by the U.S. Congress in 1901 and charged with establishing a measurement foundation to facilitate U.S. and international commerce. NIST

Polarization Effects of X-ray Monochromators Modeled Using Dynamical Scattering Theory

July 1, 2021
Author(s)
Marcus Mendenhall, David R. Black, Donald Windover, James Cline
The difference in the diffracted intensity of the sigma-and pi-polarized components of an X-ray beam in powder diffraction has generally been treated according to equations based on dipole scattering, also known as kinematic X-ray scattering. Although this

Crystal Chemistry, X-ray Diffraction Reference Patterns, and Band Gap Studies for (BaxSr1-x)2CoWO6 (x=0.1, 0.2, 0.3, 0.5, 0.7, 0.9)

September 11, 2020
Author(s)
Winnie K. Wong-Ng, Guangyao Liu, Yuqi Yang, Rola M. Derbeshi, Donald A. Windover, James A. Kaduk
X-ray reference powder patterns and structures have been determined for a series of cobalt- and tungsten-containing cubic alkaline-earth perovskites, (BaxSr1-x)2CoWO6 (x=0.1, 0.2, 0.3, 0.5, 0.7, 0.9). The structure of the end members of the series

Metrological Tools for the Reference Materials and Reference Instruments of the NIST Material Measurement Laboratory

July 15, 2020
Author(s)
Carlos R. Beauchamp, Johanna Camara, Jennifer Carney, Steven J. Choquette, Kenneth D. Cole, Paul C. DeRose, David L. Duewer, Michael Epstein, Margaret C. Kline, Katrice Lippa, Enrico Lucon, Karen W. Phinney, Maria Polakoski, Antonio Possolo, Katherine E. Sharpless, John R. Sieber, Blaza Toman, Michael R. Winchester, Donald Windover
The National Institute of Standards and Technology (NIST), formerly the National Bureau of Standards, was established by the U.S. Congress in 1901 and charged with establishing a measurement foundation to facilitate U.S. and international commerce. NIST

High-precision measurement of the X-ray Cu K-alpha spectrum

May 12, 2017
Author(s)
Marcus H. Mendenhall, Albert Henins, Lawrence T. Hudson, Csilla I. Szabo-Foster, Donald A. Windover, James P. Cline
The structure of the x-ray emission lines of the Cu Kα complex has been remeasured on a newly commissioned instrument, in a manner directly traceable to the Système Internationale definition of the meter. In this measurement, the region from 8000 to 8100

Advancing X-Ray Scattering Metrology Using Inverse Genetic Algorithms

July 7, 2016
Author(s)
Adam F. Hannon, Daniel F. Sunday, Donald A. Windover, Regis J. Kline
We compare the speed and effectiveness of two genetic optimization algorithms to the results of statistical sampling via a Markov Chain Monte Carlo algorithm to find which is the most robust method for determining real space structure in periodic gratings

Certification of Standard Reference Material 1878b Respirable Alpha Quartz

June 9, 2016
Author(s)
David R. Black, Marcus H. Mendenhall, Pamela S. Whitfield, Donald A. Windover, Albert Henins, James J. Filliben, James P. Cline
The National Institute of Standards and Technology (NIST) certifies a suite of Standard Reference Materials (SRMs) to address specific aspects of the performance of X-ray powder diffraction instruments. This report describes SRM 1878b, the third generation

The Optics and Alignment of the Divergent Beam Laboratory X-ray Powder Diffractometer and its Calibration with NIST Standard Reference Materials

September 25, 2015
Author(s)
James P. Cline, Marcus H. Mendenhall, David R. Black, Donald A. Windover, Albert Henins
The laboratory X-ray powder diffractometer is one of the primary analytical tools in materials science. It is applicable to nearly any crystalline material, and with advanced data analysis methods, it can provide a wealth of information concerning sample