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Search Publications

NIST Authors in Bold

Displaying 5126 - 5150 of 73697

Asymmetric Enhanced Intermixing in Co/Ti Bilayer

October 12, 2021
Author(s)
P Sule, L Kotis, L Toth, M. Menyhard, William F. Egelhoff Jr.
Low-energy ion-beam intermixing has been studied by Auger depth profiling and by molecular dynamics simulations in Co/Ti and Ti/Co bilayers. The agreement between theory and experiment is satisfactory. Both of them suggest the occurrence of the asymmetry

Atomic Transition Probabilities for DyI and DyII

October 12, 2021
Author(s)
M E. Wickliffe, James E. Lawler, Gillian Nave
Atomic transition probabilities for 915 spectral lines of neutral and singly ionized dysprosium are reported. Typical uncertainties are less than +/- 10%. Branching fractions, measured using the 1.0 m Fourier transform spectrometer (FTS) at the National

Atomistic Insights into Disclocation Dynamics in Metal Forming

October 12, 2021
Author(s)
Francesca Tavazza, Anne M. Chaka, Lyle E. Levine
Almost all of the mechanical behavior changes that occur during plastic deformation result from the evolution of dislocation structures. Statistical models, like strain percolation theory, have been developed to understand the transport of dislocations

Barium Strontium Titaanate Thin Film Analysis

October 12, 2021
Author(s)
T Remmel, R Deslattes, S Fujimura, H Honma, H Kobayashi, H Kohno, S M. Owens, J Pedulla, M Schulberg
Barium Strontium Titanate (BST) is under consideration as a high dielectric constant material for a number of semiconductor applications. Because of its very large dielectric constant, BST is seen as an enabling material that will allow the continual

Benchmark Gauging System for a Small-Scale Liquid Hydrogen Tank

October 12, 2021
Author(s)
N T. Van Dresar, James D. Siegwarth
A system to accurately weigh the fluid contents of a small-scale liquid hydrogen test tank has been experimentally verified. It is intended for use as a reference or benchmark system when testing low-gravity liquid quantity gauging concepts in the

Blackbody Radiation Shift in a 43 Ca + Ion Optical Frequency Standard

October 12, 2021
Author(s)
B Arora, M S. Safronova, Charles W. Clark
Motivated by the prospect of an optical frequency standard based on 43Ca+, we calculate the blackbody radiation (BBR) shift of the 4s1/2 - 3d5/2 clock transition, which is a major component of the uncertainty budget. The calculations are based on the

Broadband Dielectric Measurement of Liquids

October 12, 2021
Author(s)
James R. Baker-Jarvis, Michael D. Janezic, Jerzy Krupka
In this paper we report on the measurement of the dielectric properties of liquids using two methods. When combined, these methods can yield broadband, high-accuracy measurements of liquids from megahertz to gigahertz frequencies. These methods are the

Bulk-Like Properties Observed From High Density GaN Nanocolumns Grown by Molecular Beam Epitaxy

October 12, 2021
Author(s)
J E. Van Nostrand, R Cortez, J Boecki, J D. Albrecht, C E. Stutz, K L. Averett, Norman Sanford, Albert Davydov
Vertical GaN nanocolumns (NCs) having a width of 90+10 nm and a length of the film thickness were grown by plasma-assisted molecular beam epitaxy on Al_subscript 2)O_subscript 3} (0001). Low temperature photo-luminescence measurements of NC films results

c-Axis Oriented Epitaxial BaTiO 3 Films on (001) Si

October 12, 2021
Author(s)
V Vaithyanathan, J Lettieri, W Tian, A Kochhar, H Ma, A Sharan, A Vasudevarao, J. A. Aust, Y Li, Long-Qing Chen, P Zschack, Joseph Woicik
c-axis oriented epitaxial films of the ferroelectric BaTiO3 have been grown on (001) Si by reactive molecular-beam epitaxy (MBE). The orientation relationship between the film and substrate is (001) BaTiO3 // (001) Si and [100] BaTiO3 // [110] Si. The

Carrier-Envelope Phase Stabilization of Modelocked Lasers

October 12, 2021
Author(s)
T M. Fortier, D J. Jones, Scott Diddams, John L. Hall, Jun Ye, S T. Cundiff, R S. Windeler
Carrier-envelope phase stabilization of few cycle optical pulses has recently been realized. This advance in femtosecond technology is important in both extreme nonlinear optics and optical frequency metrology. The development of air-silica microstructure

Carrier-Envelope Phase Stabillization of Single and Multiple Femtosecond Lasers

October 12, 2021
Author(s)
D J. Jones, S T. Cundiff, T M. Fortier, J L. Hall, Jun Ye
The basic concepts, technical implementations, and known limitations of actively stabilizing the carrier-envelope phase of a few cycle pulse train are discussed. The route toward determining the absolute carrier-envelope phase, thereby enabling electronic

Carrier-Pulse Envelope Dynamics in Passively Mode-Locked Ti:Sapphire Lasers

October 12, 2021
Author(s)
K W. Holman, R J. Jones, A Marian, S T. Cundiff, Jun Ye
We have performed systematic studies of intensity-related dynamics of the pulse repetition and carrier-envelope offset frequency in passively mode-locked Ti: sapphire lasers. We compare the results between two different repetion frequency laser systems

Cavitation Creep in the Next Generation Silicon Nitride

October 12, 2021
Author(s)
F Lofaj, Sheldon M. Wiederhorn, Gabrielle G. Long, P R. Jemian, M Ferber
X-ray scattering (A-USAXS). Failure strains were around 0.5 %. The creep resistance of this grade was found to be up to two orders of magnitude better than that of other silicon nitrides. The corresponding stress exponents were higher than 6. Creep damage

CCM Key Comparison in the Pressure Range 0.05 MPa to 1 MPa (Gas Medium, Gauge Mode) - Phase A1: Dimensional Measurements and Calculation of Effective Area

October 12, 2021
Author(s)
G F. Molinar, B Rebaglia, A Sacconi, J C. Legras, G P. Vailleau, James W. Schmidt, John R. Stoup, D R. Flack, Waldimir Sabuga, O Jusko
The results obtained by five laboratories in the determination of the effective areas of two gas-operated 10 cm 2 piston-cylinder assemblies from dimensional measurements carried out as part, called phase A1, of a key comparison in the pressure range 0.05
Displaying 5126 - 5150 of 73697
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