U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 26 - 50 of 3837

Investigation of the fracture resistance of high strength ferritic steel welds in gaseous hydrogen environment

April 22, 2024
Author(s)
Paolo Bortot, Matteo Ortolani, Michele Sileo, Erick Escorza, Matthew Connolly, Zack Buck, Ashwini Chandra
… Hydrogen is expected to play a major role in the … and tempered ferritic steels are widely used for gaseous hydrogen storage despite the fact that hydrogen affects material properties and result in higher … International Journal of Hydrogen Energy … hydrogen gas, quenched and tempered ferritic steel, fracture …

Do Specific Ion Effects on Collective Relaxation Arise from Perturbation of Hydrogen-Bonding Network Structure?

June 24, 2024
Author(s)
Jennifer Clark, Jack F. Douglas
… arises from respective breakdown or enhancement of the hydrogen-bonding network structure. Recent quasi-elastic … were interpreted as confirming this proposed origin of ion effects on the dynamics of water. However, we find … of salts to water. A thorough understanding of specific ion effects should be useful in diverse material …

Zn-MOF Assisted Dehydrogenation of Ammonia Borane: Enhanced Kinetics and Clean Hydrogen Generation

February 1, 2012
Author(s)
Gadipelli Srinivas, Jamie Ford, Wei Zhou, Taner Yildirim
… We report controllable and enhanced hydrogen release kinetics at reduced temperatures in ammonia … via solution infiltration. The ABMOF system provides clean hydrogen by suppressing the release of detrimental volatile … These byproducts prevent the direct use of AB as a hydrogen source for polymer electrolyte membrane fuel cell …

Hydrogen storage in rapidly solidified and crystallized Mg-Ni-(Y,La)-Pd alloys

April 9, 2012
Author(s)
Eric Lass
… and used as precursors for creating nanocrystalline hydrogen storage materials. The resulting materials demonstrate relatively high hydrogen capacity of around 4.5 mass % H and excellent … at 573 K. Additionally, the alloys demonstrate reversible hydrogen storage at 473 K. A composition of Mg85Ni10Y2.5Pd2.5 …

In Situ Neutron Transmission Bragg Edge Measurements of Strain Fields Near Fatigue Cracks Grown in Air and in Hydrogen

August 14, 2017
Author(s)
Matthew Connolly, Peter Bradley, Andrew Slifka, Elizabeth S. Drexler
… field were performed near cracks grown in air and in hydrogen. Through the use of a novel test chamber which is capable of pressurization with hydrogen gas, and amenable to neutron-scattering … and discussed in the context of proposed mechanisms of hydrogen-assisted fatigue crack growth. …

Program and Abstracts for the International Conference on Hydrogen Effects on Material Behavior & Corrosion Deformation Interactions

September 12, 2001
Author(s)
N R. Moody, A -. Thompson, Richard E. Ricker, G S. Was, T -. Magnin
… and abstracts book for the International Conference on Hydrogen Effects on Material Behavior and Corrosion … corrosion, deformation, hydrogen, hydrogen embrittlement, stress corrosion cracking … International Conference on Hydrogen Effects on Materials Behavior and Corrosion …

Fundamental Constants and the Hydrogen Atom

January 1, 2001
Author(s)
Peter J. Mohr, Barry N. Taylor
… determined primarily by precise frequency measurements in hydrogen and deuterium. … Fundamental Constants and the Hydrogen Atom … Hydrogen Atom II: Precision Physics of Simple Atomic Systems … Fundamental Constants and the Hydrogen Atom …

Atomic Hydrogen for the Formation of Abrupt Sb Doping Profiles in MBE-Grown Si

May 1, 1998
Author(s)
P E. Thompson, C Silvestre, M E. Twigg, G Jernigan, David S. Simons
… Previously atomic hydrogen has been shown to be effective in reducing the … epitaxygrowth. In this work we have investigated atomic hydrogen to determine if it is equally effective in reducing … we demonstrated that the co-deposition of atomic hydrogen during Sb doping of Si at 500 C reduced the surface …

Preliminary Performance Assessment of Commercially-Available Hydrogen Sensors

November 12, 2007
Author(s)
Nathan D. Marsh, Thomas G. Cleary
… standard test methods for the performance of commercial hydrogen sensors, we employed the Fire Emulator / Detector … of a representative selection of commercially-available hydrogen sensors. These sensors depend on a variety of … They were evaluated both for their response to hydrogen concentrations up to half the lower flammability …

Measurements of effective diffusion coefficients of helium and hydrogen through gypsum

July 3, 2013
Author(s)
Jiann C. Yang, William M. Pitts, Marco G. Fernandez, Kuldeep R. Prasad
… to obtain effective diffusion coefficients of helium and hydrogen (released as forming gas for safety reasons) through … International Journal of Hydrogen Energy … Diffusion coefficient, Gypsum, Helium, Hydrogen … of effective diffusion coefficients of helium and hydrogen through gypsum …

Effect of Hydrogen on Pb(Zr,Ti)O 3 -Based Ferroelectric Capacitors

October 1, 1998
Author(s)
S R. Perusse, C W. Tipton, H D. Drew, T Venkatesan, R Ramesh, D B. Romero, V B. Podobedov, A Weber
… ferroelectric films are known to degrade when subjected to hydrogen in forming gas anneals. Earlier studies have … that though oxygen is lost during forming gas annealing, hydrogen incorporation is the primary mechanism for the … [OH-] bonds in the films. The most probable site for hydrogen ions is discussed based on ionic radii, crystal …

Negative Ion-Neutral Reactions in Townsend Discharges

July 1, 1999
Author(s)
James K. Olthoff, MVVS. Rao
… Relative intensities and translational ion-flux energy distributions are presented for negative ions … 2 kTd). These results are discussed in light of relevant ion-molecule reactions where available. … CF 4 , ion molecule reactions, negative ions, O 2 , SF 6 , Townsend …

High Resolution Inter- and Intramolecular Spectroscopy of Hydrogen Bonded Clusters: Benchmark Tests of Theory

January 1, 2000
Author(s)
David J. Nesbitt, S Davis, D T. Anderson
… tool for sub-Doppler near-IR spectroscopic study of hydrogen-bonded clusters under jet cooled conditions. The … associated with large amplitude vibrational motion of the hydrogen bond. In this paper, we describe efforts to map out … of all vibrational degrees of freedom for any hydrogen-bonded system. These data on HF-HF and DF-DF are …

MEASUREMENTS OF EFFECTIVE DIFFUSION COEFFICIENT OF HELIUM AND HYDROGEN THROUGH GYPSUM

September 14, 2011
Author(s)
Jiann Yang, William M. Pitts, Marco Fernandez, Kuldeep Prasad
… to obtain effective diffusion coefficients of helium and hydrogen (released as forming gas for safety reasons) through … gypsum panel was 1.3 × 10-5 m2/s and 1.4 × 10-5 m2/s for hydrogen. … Diffusion, Dispersion, Fire Safety, Garage, Gypsum, Helium, Hydrogen, Sensors …

Dose Calibration of Ion Implanters for Semiconductor Production

February 1, 1998
Author(s)
F A. Stevie, David S. Simons, J M. McKinley, J McMacken, R Santiesteban, P Flatch, J Becerro
… a relative uncertainty of less of 5%. The does of boron ion implants were measured by secondary ion mass spectrometry at two different laboratories using … Secondary Ion Mass Spectrometry SIMS XI … boron, ion implantation, silicon, SIMS … Dose Calibration of Ion Implanters for Semiconductor Production …

Infrared Spectra of Small Molecular Ions Trapped in Solid Neon

October 3, 2010
Author(s)
Marilyn E. Jacox
… Experiments in this laboratory trap molecular ions in dilute solid solution in neon at 4.2 K in sufficient … charge neutrality of the deposit. Recent observations of ions produced from C2H4 and BF3 will be discussed. Because of … Spectroscopy of Molecular Ions in the Laboratory and in Space …

Highly Charged Ion Studies at the NIST EBIT

January 1, 2001
Author(s)
L P. Ratliff, J R. Roberts
… Highly Charged Ion Studies at the NIST EBIT … atoms, EBIT, electron beam ion trap, highly charged ions, ions … Highly Charged Ion Studies at the NIST EBIT …

A NUMERICAL STUDY OF THE RELEASE AND DISPERSION OF A BUOYANT GAS IN PARTIALLY CONFINED SPACES

March 4, 2011
Author(s)
Kuldeep R. Prasad, William M. Pitts, Jiann C. Yang
… Development of the hydrogen economy will require a better understanding of the … and explosions associated with the unintended release of hydrogen within a structure. The ability to predict the mixing and dispersion behavior of hydrogen, when accidentally released in a partially confined …

FCGR of Pipeline Steels in Pressurized Hydrogen Gas: A Comparison of Cyclic Loading Rates

May 5, 2014
Author(s)
Elizabeth S. Drexler, Andrew J. Slifka, Robert L. Amaro, Damian S. Lauria
… A gaseous hydrogen environment is believed to have a deleterious effect … conducting tests at sufficiently slow rates in a gaseous hydrogen environment can be prohibitively long and expensive, … at cyclic loading rates of 1 Hz, 0.1 Hz, and 0.01 Hz in a hydrogen gas environment pressurized to 5.5 MPa or 34 MPa. …

Trapping Highly Charged Ions: Fundamentals and Applications

April 1, 2000
Author(s)
John D. Gillaspy
… Fundamentals and applications for trapping highly charged ions. … Trapping Highly Charged Ions: Fundamentals and Applications … Trapping Highly Charged Ions: Fundamentals and Applications …

Hydrogen Release and Combustion Measurements in a Full Scale Garage

January 1, 2010
Author(s)
Matthew Blais, Alexandra Joyce
… to support NIST efforts on characterizing the behavior of hydrogen when released into enclosed spaces (e.g. leakage of hydrogen from a fuel-cell powered automobile parked inside a … were designed to characterize both the dispersion of hydrogen and combustion behavior of any flammable mixtures …

Relativistic Atomic Structure Theory for Highly-Charged Ions

February 19, 2017
Author(s)
Yong Sik Kim
… summarized with emphasis on applications to highly-charged ions. … Trapping Highly-Charged Ions: Fundamentals and Applications … atomic structure theory, highly-charged ions, relativity … Relativistic Atomic Structure Theory for Highly-Charged Ions …

Thermodynamic Evaluation of Hydrogen Absorption by Niobium During SRF Fabrication

June 30, 2011
Author(s)
Richard E. Ricker, Ganapati R. Myneni
… conditions. One hypothesis for these variations is that hydrogen, absorbed during processing, is responsible for this … behind this hypothesis is that niobium can absorb hydrogen from one or more of the processing environments. … spontaneously react with water producing adsorbed atomic hydrogen that is readily absorbed into the metal. The …
Displaying 26 - 50 of 3837
Was this page helpful?