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 851 - 875 of 3841

Electron Self-Energy for the K and L Shells at Low Nuclear Charge

April 1, 2001
Author(s)
U Jentschura, Peter J. Mohr, G Soff
… electron self energy for the K- and L-shell states of hydrogen like ions with nuclear charge numbers Z = 1 to 5 is … 1/2 state has a numerical uncertainty of 0.8 Hz in atomic hydrogen, and for the L-shell states (2S 1/2 , 2P 1/2 and 2P …

Calculation of the Electron Self Energy for Low Nuclear Charge

January 1, 1999
Author(s)
U Jentschura, Peter J. Mohr, G Soff
… evaluation of the one-photon electron self-energy for hydrogen like ions with low nuclear charge numbers Z = 1 to … for 1S state has a numerical uncertainty of 0.8 Hz for hydrogen and 13 Hz for singly-ionized helium. Resummation and …

Initial Etching of GaAs (001) During H 2 Plasma Cleaning

September 1, 2000
Author(s)
Steven W. Robey, K Sinniah
… steps. This effect is suggested top be associated with the hydrogen incorporation in the near-surface in the vicinity of … AFM, etch, GaAs, hydrogen, plasma …

Measuring Ion-Pairing in Buffer Solutions with Microwave Microfluidics

June 14, 2018
Author(s)
Angela C. Stelson, Charles A. Little, Nathan D. Orloff, Christian J. Long, James C. Booth
… such as electrical double layers (EDL), solvent-mediated ion interactions, and bound water molecules. However, … relaxations associated with the EDL, water molecules, and ion-pairing in solution. We compare the three-Debye … fit to a Cole-Cole/Debye model which does not include the ion-pairing relaxation, and find improved goodness of fit. …

Experimental Characterization of Helium Dispersion in a -Scale Two-Car Residential Garage (NIST TN 1694)

March 28, 2011
Author(s)
William M. Pitts, Jiann Yang, Marco Fernandez
… with the surroundings. Helium was used as a surrogate for hydrogen, and the total volume released was scaled as the amount that could be released by a typical hydrogen-fueled automobile with a full fuel tank. Temporal … pressure, doorway fan tests, garages, helium mixing, hydrogen, hydrogen-fueled automobiles, reference data sets …

Density changes in amorphous silicon induced by swift heavy ions

October 4, 2022
Author(s)
Sjoerd Roorda, Amelie Lacroix, Stephanie Codsi, Gabrielle Long, Fan Zhang, Steven Weigand, Christina Trautmann
… silicon membranes were irradiated with swift heavy ions (75 MeV Ag or 1.1 GeV Au ions) and studied by small angle X-ray scattering. The samples that were irradiated with 1.1 GeV Au ions produced a scattering pattern consistent with core-shell … Density changes in amorphous silicon induced by swift heavy ions …

EBIT Diagnostics Using X-ray Spectra of Highly Ionized Ne

May 1, 2003
Author(s)
M Matranga, M Barbera, A Maggio, G Peres, S Serio, E Takacs, E Silver, John D. Gillaspy, H. Schnopper, J M. Laming, J. Beeman, E. E. Haller, N. Madden
… line ratio. We have investigated possible effects of the ion dynamics on the plasma emission line intensities, looking … and hence the overlap between the electron beam and the ion cloud, depend on the electron beam operating parameters. … the value of future improved studies of the trapped ion dynamics, both for understanding the EBIT performance and …

Composition and Morphology Changes and their Influence on Hydrogen Evolution on Ni-Mo and Fe-Mo Alloys Electrodeposited by DC and Pulsed Current

June 1, 2002
Author(s)
V D. Jovic, B M. Jovic, Gery R. Stafford
… was particularly sensitive to the co-generation of hydrogen and most deposits were micro-cracked.It was found … possess about 0.15V lower overvoltage than mild steel for hydrogen evolution in an electrolyte commonly used in commercial chlorate production. The hydrogen evolution overvoltage for electrodeposited Ni-Mo …

Measurements of trapped-ion heating rates with exchangeable surfaces in close proximity

January 15, 2017
Author(s)
Dustin A. Hite, Kyle S. McKay, Shlomi Salman Kotler, Dietrich G. Leibfried, David J. Wineland, David P. Pappas
… Electric-field noise from the surfaces of ion-trap electrodes couples to the ion’s charge causing heating of the ion’s motional modes. This heating limits the fidelity of … Measurements of trapped-ion heating rates with exchangeable surfaces in close …

Coherent Quantum State Manipulation of Trapped Atomic Ions

January 1, 1998
Author(s)
David J. Wineland, C Monroe, D M. Meekhof, B E. King, Dietrich G. Leibfried, Wayne M. Itano, James C. Bergquist, D J. Berkeland, John J. Bollinger, J D. Miller
… realizing, quantum computation based on multiple trapped ions. … Coherent Quantum State Manipulation of Trapped Atomic Ions …

Degradation of Poly(Acrylates)Under SF 5 + Primary Ion Bombardment Studied Using Time of Flight Secondary Ion Mass Spectrometry 2. Poly(n-Alkyl Methacrylates)

January 5, 2005
Author(s)
M S. Wagner
… molecular depth profiling of these polymers by secondary ion mass spectrometry (SIMS). This study is the second in a … chemistry on polymer degradation under polyatomic primary ion bombardment. In this study, time-of-flight SIMS … sputter rate and stability of the characteristic secondary ion intensities of these polymers decreased linearly with …

Quantifying the Effect of Guest Binding on Host Environment

August 29, 2023
Author(s)
Angela Stelson, Zack Fishman, Jacob Pawlik, Gosia Musial, Jim Booth, Chris Long, Kathleen Schwarz, Nate Orloff, Hugh Ryan, Angela Grommet, Jonathan Nitschke, Felix Rizzuto
… microfluidic spectroscopy to quantify the hydration and ion pairing of a FeII4L4 coordination cage with a set of … guest. The impact of different guest properties on host ion pairing and hydration was determined through microwave … of the guest has the greatest impact on the solvent and ion-pairing dynamics surrounding the host. We also observed …

The Effect of Substrate Material on Silver Nanoparticle Antimicrobial Efficacy

December 1, 2010
Author(s)
Benita Dair, Dave M. Saylor, T. E. Cargal, Grace R. French, Kristen M. Kennedy, Rachel S. Casas, Jonathan E. Guyer, James A. Warren, Steven K. Pollack
… bulk counterparts may be attributed to an increased silver ion (Ag+) solubility, and hence availability, that arises due … and experiment to determine the effect of substrate on ion release from silver particles in electrochemical … also observed that with time of exposure to DI water, Ag+ ion release increases to a maximum value at 5 minutes before …
Displaying 851 - 875 of 3841
Was this page helpful?