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Search Publications

NIST Authors in Bold

Displaying 201 - 225 of 3839

Ductility-driven ranking system for API-grade steels in high pressure gaseous hydrogen transmission pipelines

December 19, 2022
Author(s)
Douglas Stalheim, Andrew Slifka, Matthew Connolly, Enrico Lucon, Aaron Litschewski, Pello Uranga
… There is strong economic and environmental interest in hydrogen as an energy source to contribute to combatting climate change. Hydrogen diffusion into the steel with assistance through … fracture toughness and fatigue, through embrittlement or hydrogen induced cracking. Fracture toughness as a measure of …

Capture of Highly Charged Ions in a Pseudo-Hyperbolic Paul Trap

July 12, 2019
Author(s)
Joan M. Dreiling, Aung Naing, Joseph Tan, Joshua Hanson, Shannon Hoogerheide, Samuel Brewer
… The confinement of ions in a radio-frequency (RF) trap (also known as a Paul … can be created in situ within the ion trap. Highly charged ions, on the other hand, are produced efficiently in … here, phase-space-optimized bunches of highly charged ions produced by an electron beam ion trap/source are …

Direct Measurement of Hydrogen Dislocation Pipe Diffusion in Deformed Polycrystalline Pd using Quasielastic Neutron Scattering

July 10, 2014
Author(s)
Brent J. Heuser, Dallas R. Trinkle, Niina Jalarvo, Joseph Serio, Eugene Mamontov, Madhu Sudan Tyagi
… The large incoherent neutron scattering cross section of hydrogen allows QENS measurements at the low solute … diffusion. We observe diffusion coefficients for trapped hydrogen elevated by one to two orders of magnitude above … polycrystalline Pd. For regular bulk diffusion of hydrogen in Pd we find D(T)=D o exp(-E z/kT)=0.006xp(-0.23 …

Hydrogen Dynamics in Ce 2 Fe 17 H 5 : Inelastic and Quasielastic Neutron Scattering Studies

September 21, 2011
Author(s)
Alexander V. Skripov, N. V. Mushnikov, P. B. Terent'ev, V. S. Gaviko, Terrence J. Udovic, John J. Rush
… The vibrational spectrum of hydrogen and parameters of H jump motion in the rhombohedral … and quasielastic neutron scattering. It is found that hydrogen atoms occupying interstitial Ce 2 Fe 2 sites … of 103plus and minus}3 meV. Our results suggest that the hydrogen jump rate in Th 2 Zn 17 -type compounds strongly …

Reaction Chromatography /Mass Spectrometry. 1. Gas chromatograph hydrogenation microreactor - mass Spectrometer system for the study of Olefins.

March 1, 1985
Author(s)
Anzor I. Mikaia, Vladimir Smetanin, Vladimir G. Zaikin
… of hydrogen as a carrier and reagent gas, the spectra of hydrogenation products provide information on the structure … GC-MS, Electron ionization, Olefins, Catalytic hydrogenation … Chromatography /Mass Spectrometry. 1. Gas chromatograph hydrogenation microreactor - mass Spectrometer system for the …

Optimal Ion Trapping Experiment

May 10, 2007
Author(s)
Kevin J. Coakley
… because it goes dead after detecting the first trapped ion. There is a dead time {\delta} between the end of the … ion traps, probability theory, statistics … Optimal Ion Trapping Experiment …

Model for the Asymmetric DC and Fluctuating Conduction of an Ion Channel

October 16, 2008
Author(s)
B Robertson, John J. Kasianowicz
… A model for the asymmetric DC conduction of an ion channel is compared with measurements of the ionic … carried by an aqueous potassium chloride solution through ion channels formed by alpha hemolysin in a lipid bilayer. … and salt concentration is given. A model for the noise in ion conduction is also formulated. The randomness of proton …

Fast Ground State to Ground State Separation of Small Ion Crystals

October 10, 2024
Author(s)
Tyler Gugliemo, Dietrich Leibfried, Stephen Libby, Daniel Slichter
… into different subsets is critical for realizing trapped ion quantum computing architectures where ions are rearranged … suitable for separation of a mixed-species three-ion crystal on timescales similar to that of free expansion … trapped ions, quantum information, ion separation, mixed species …

Hydrogen in nonstoichiometric cubic titanium monoxides: X-ray and neutron diffraction, neutron vibrational spectroscopy and NMR studies

December 1, 2021
Author(s)
A. V. Skripov, A. V. Soloninin, A. A. Valeeva, A. I. Gusev, A. A. Rempel, Hui Wu, Terrence J. Udovic
… Hydrogen-induced changes in the properties of … this structure can be attributed to the broken symmetry of hydrogen sites in the titanium monoxides: because of the … that both hydrogenated compounds are metallic; no signs of hydrogen diffusive motion in TiO0.72H0.30 and TiO0.96H0.14 at …

Electron- and Photon-Stimulated Desorption of Atomic Hydrogen From Radiation-Modified Alkali Halide Surfaces

October 1, 2000
Author(s)
Lawrence T. Hudson, N H. Tolk, C Bao, P Norlander, D P. Russell, J. Xu
… The desorption yields of excited hydrogen atoms from the sufaces of KCI, KBr, NaCl, NaF and … or photon bombardment, the fluorescence from excited hydrogen atoms ejected from the surface is monitored. The … hydride molecule/complex leading to the desorption of hydrogen atoms possessing several electron volts of kinetic …

Hydrogen Storage with Aluminum Formate, ALF: Experimental, Computational, and Technoeconomic Studies

September 28, 2023
Author(s)
Hayden Evans, Taner N. Yildirim, Peng Peng, Yongqiang Cheng, Zeyu Deng, Qiang Zhang, Dinesh Mullangi, Dan Zhao, Pieremanuele Canepa, Hanna M. Breunig, Anthony K. Cheetham, Craig Brown
… Long-duration storage of hydrogen is necessary for coupling renewable H2 with … performance for long-duration storage versus compressed hydrogen and leading metal−organic frameworks. In the TEA, it … Adsorption, Hydrogen storage, ALF … Hydrogen Storage with Aluminum Formate, ALF: Experimental, …

Transport dynamics of single ions in segmented microstructured Paul trap arrays

August 4, 2006
Author(s)
Rainer Reichle, Dietrich G. Leibfried, Brad R. Blakestad, Joseph W. Britton, John D. Jost, Emanuel H. Knill, C. Langer, R Ozeri, Signe Seidelin, David J. Wineland
… It was recently proposed to use small groups of trapped ions as qubit carriers in miniaturized electrode arrays that … a large number of individual trapping zones, between which ions could be moved. This approach might be scalable for … of quantum information is achieved by transporting ions to and from separate memory and qubit manipulation zones …

Correlation for the Viscosity of Hydrogen obtained from Symbolic Regression

March 27, 2013
Author(s)
Chris D. Muzny, Marcia L. Huber, Andrei F. Kazakov
… for a wide-ranging correlation for the viscosity of normal hydrogen. The correlation covers the temperature range from … hydrogen, symbolic regression, viscosity … Correlation for the Viscosity of Hydrogen obtained from Symbolic Regression …

Chloride Ion Activity and Susceptibility of Al Alloys 7075-T6 and 5083-H131 to Stress Corrosion Cracking

March 1, 2013
Author(s)
Richard E. Ricker, Eun Lee, R. Taylor, C. Lei, B. Pregger, E. Lipnickas
… The influence of chloride ion activity on the susceptibility of aluminum alloys … and ductility of both alloys decreased with chloride ion activity in a manner that indicates a chemical reaction … of magnitude slower. It was deduced that the chloride ion interacts chemically with the passivated surface in the …

Evidence for multiple mechanisms underlying surface-electric field noise in ion traps

December 27, 2018
Author(s)
J. A. Sedlacek, J. Stuart, Daniel Slichter, C. D. Bruzewicz, R. McConnell, J. M. Sage, J. Chiaverini
… Energetic ion bombardment, or ion milling, of ion-trap electrode surfaces has previously been shown to … Here, using motional heating of a single trapped strontium ion, we investigate the temperature dependence of this noise … anomalous heating, electric field noise, ion milling, ion trap …

Effects of Dimensionality on the Electronic Structure of Ruddlesden-Popper Chromates Srn+1CrnO3n+1

July 18, 2024
Author(s)
Spencer Doyle, Lerato Takana, Margaret Anderson, Dan Segedin, Hesham El-Sherif, Charles Brooks, Xiaoping Wang, Padraic Shafer, Alpha N'Diaye, Ismail El Baggari, William Ratcliff, Andres Cano, Quintin Meier, Julia Mundy
… superconductivity. In this context, the Ruddlesden-Popper chromates Srn+1CrnO3n+1 emerge as a particularly intriguing … films of the perovskite SrCrO3 and the associated layered chromates via oxide molecular beam epitaxy for n = 1 to n = … on the Electronic Structure of Ruddlesden-Popper Chromates Srn+1CrnO3n+1 …

Color Quality (book chapter)

July 11, 2017
Author(s)
Yoshihiro Ohno
This book chapter provides the fundamentals of colorimetry and color quality for solid state lighting, including descriptions of the current standards on chromaticity of SSL light sources and color rendering, and recent studies on these topics. Section 8.1

NIST Colorimetric Calibration Facility for Displays - Part 2

June 1, 2001
Author(s)
F Manoocheri, Steven W. Brown, Yoshi Ohno
velopment of a calibration facility for spectroradiometric, colorimetric, and goniometric measurements of displays, display colorimeters, and spectroradiometers has been completed at the National Institute of Standards and Technology (NIST). An overview of

Delicate Tuning of Reaction Thermodynamics via Formation of Bimetal Phenoxide: Synthesis, Structure, and Hydrogen Storage Performance

May 2, 2025
Author(s)
Nor I. Nordin, Khai C. Tan, Hong Wen, Xiaohua Ju, Wei Zhou, Hui Wu, Teng He, Ping Chen, Yong Chua
… Arene-cycloalkane pairs are promising for hydrogen storage but often encounter unfavorable … bimetal organic compounds show potential for vehicular hydrogen storage, demonstrating efficient hydrogen uptake at 90 °C and partial reversibility at 140 °C. … phenoxide, hydrogen storage, X-ray crystallography …

Mobilities and Formation Kinetics of NH 4 + (NH 3 ) n Cluster Ions (n=0-3) in helium and helium/ammonia mixtures

January 1, 1997
Author(s)
M Krishnamurthy, J A. de Gouw, L N. Ding, V M. Bierbaum, S R. Leone
… NH 4 + (NH 3 ) n (n=1-3) cluster ions are formed in a field free flow tube section of a … measurements. The zero-field mobilities of the cluster ions in helium (22.1 +or-}0.3 cm 2 V -1 s -1 for NH 4 + , … of the geometric cross sections of the different cluster ions. The zero-field mobilities of NH 4 + (0.94 +or-} 0.15 cm …

Microfabricated Chip Traps for Ions

April 12, 2011
Author(s)
Jason Amini, Joseph W. Britton, Dietrich G. Leibfried, David J. Wineland
… ions, traps, microfabrication … Microfabricated Chip Traps for Ions …

Spectroscopic Identification of Hydrogen Spillover Species in Ruthenium-modified High Surface Area Carbons by Diffuse Reflectance Infrared Fourier Transform Spectroscopy

December 17, 2012
Author(s)
Jeffrey L. Blackburn, Chaiwat Engtrakul, Justin B. Bult, Katherine Hurst, Yufeng Zhao, Qiang Xu, Philip A. Parilla, Lin J. Simpson, John-David R. Rocha, Matthew Ross Hudson, Craig Brown, Thomas Gennett
… for their potential application within vehicular hydrogen storage applications. One method by which sorbents have been reported to store appreciable hydrogen at room temperature is via a spillover process: where molecular hydrogen is first dissociated by metal nanoparticle catalysts …

A Focused Chromium Ion Beam

October 21, 2010
Author(s)
Adam V. Steele, Brenton J. Knuffman, Jabez J. McClelland, Jon Orloff
… With the goal of expanding the capabilities of focused ion beam microscopy and milling systems, we have demonstrated … of chromium ions produced in a magneto-optical trap ion source (MOTIS). Neutral chromium atoms are captured into … to energies between 0.5 keV and 3 keV. The accelerated ion beam is scanned with a dipolar deflector and focused onto …
Displaying 201 - 225 of 3839
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