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Displaying 1 - 25 of 237

Accelerometer Calibration at NBS/NIST, The Last Thirty Years.

November 22, 1997
Author(s)
Beverly F. Payne
This paper gives a short history of the development of the accelerometer calibration services at NBS/NIST from the mid-1950s to 1996. Many people were involved in the research and development that has led to the present calibration services. The references

A Direct Comparison System for Power Calibration up to 67 GHz*

July 1, 2012
Author(s)
Thomas M. Wallis, Thomas P. Crowley, Denis X. LeGolvan, Ronald A. Ginley
… sensors with 1.85 mm precision coaxial connectors up to 67 GHz has been developed. The comparison is implemented in … mm serve as transfer standards while between 50 GHz and 67 GHz, WR15 waveguide power sensors adapted to 1.85 mm serve … A Direct Comparison System for Power Calibration up to 67 GHz* …

Reversible Control of Magnetism in La 0.67 Sr 0.33 MnO 3 through Chemically-Induced Oxygen Migration

February 24, 2016
Author(s)
Alexander J. Grutter, Dustin A. Gilbert, U. S. Alaan, E. Arenholz, Brian B. Maranville, Julie A. Borchers, Y. Suzuki, Kai Liu, Brian J. Kirby
… reversible control of magnetization and anisotropy in La 0.67 Sr 0.33 MnO 3 films through interfacial oxygen migration. Gd metal capping layers deposited onto La 0.67 Sr 0.33 MnO 3 leach Oxygen from the film through a … diffusion of oxygen vacancies. After Gd-capped La 0.67 Sr .0.33 MnO 3 is exposed to atmospheric oxygen for a …

Light polarization and quantum interference effects in unresolvable atomic lines: application to a precise measurement of the 6,7Li D2 lines.

March 7, 2013
Author(s)
Roger C. Brown, Saijun Wu, James V. Porto, Craig J. Sansonetti, Clayton Simien, Samuel M. Brewer, Joseph N. Tan, John D. Gillaspy
We characterize the effect of quantum interference of light scattering on the line shapes and measured line positions in atomic spectra. These effects occur when the excited state splittings are of order the excited state line widths, and represent an

Absolute transition frequencies and quantum interference in a frequency comb based measurement of the 6,7Li D lines

July 6, 2011
Author(s)
Craig J. Sansonetti, Clayton Simien, John D. Gillaspy, Joseph N. Tan, Samuel M. Brewer, Roger C. Brown, Saijun Wu, James V. Porto
Optical frequencies of the D lines of 6,7Li were measured with a relative accuracy of 5x10-11 using an optical comb synthesizer. Quantum interference in the laser induced fluorescence for the partially-resolved D2 lines was found to produce polarization

Chemical Twinning of the Pyrochlore Structure in the System Bi 2 O 3-Nb 2O 5

January 28, 2007
Author(s)
Ian E. Grey, W G. Mumme, Terrell A. Vanderah, Robert S. Roth, C Bougerol-Chaillout
New ternary bismuth iron niobates having structures based on chemical twinning of pyrochlore are described. Bi5.67Nb10FeO35 has hexagonal symmetry, P63/mmc, a = 7.432(1) , c = 31.881(2) , Z = 2 and Bi9.3Nb16.9Fe1.1O57.8 has rhombohedral symmetry, R-3m, a =

Noble-metal dark-edge fermiology: core-hole memory and the "Zeeman Auger" effect

January 12, 2022
Author(s)
Eric L. Shirley, Joseph Woicik, Conan Weiland, Ahmed Rumaiz, Charles Cardot, Joshua Kas, John Rehr
Gold and platinum have the face-centered-cubic crystal structure, are considered noble metals, and differ by one in atomic number. Near-edge M4,5 x-ray absorption and resonant M4,5N6,7N6,7 Auger spectroscopy reveal "dark" edges and a photon-energy

Characterizing the ZrBe 2 H x Phase Diagram via Neutron Scattering Methods

January 1, 2023
Author(s)
Hui Wu, Wei Zhou, Terrence J. Udovic, Jr. Bowman, Bjorn C. Hauback
It is well-known that ZrBe 2H 1.5 exists as a single-phase hydride with hexagonal P6/mmm symmetry that undergoes some type of hydrogen sublattice ordering below 200 K (235-250 K for ZrBe 2D 1.5&). Both neutron powder diffraction and neutron vibrational

SRM 1967a: High-Purity Platinum Thermoelement

March 9, 2016
Author(s)
Karen M. Garrity, Weston L. Tew, Dean C. Ripple
… four cuts from the prior reference standard SRM 1967 (Pt-67) lot. The tests indicate that SRM 1967a differs from SRM … material that replicates the average of the Pt-67 response to within 0.25 µV up to 250 °C and rising to 0.7 …
Displaying 1 - 25 of 237
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