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NIST Authors in Bold

Displaying 376 - 400 of 2904

Hyperfine-mediated electric quadrupole shifts in Al+ and In+ ion clocks

April 6, 2017
Author(s)
Kyle P. Beloy, David R. Leibrandt, Wayne M. Itano
… the averaging schemes that are critical to other optical ion clocks. … aluminum, electric quadrupole moment, indium, ion clock, optical clock, optical frequency standard … electric quadrupole shifts in Al+ and In+ ion clocks …

EUV Spectral Lines of Highly-Charged Hf, Ta and Au Ions Observed with an Electron Beam Ion Trap

January 12, 2011
Author(s)
Ilija Draganic, Yuri Ralchenko, Joseph Reader, John D. Gillaspy, Joseph N. Tan, Joshua M. Pomeroy, Samuel M. Brewer, Dmitry D. Osin
… tantalum, and gold were produced with an electron beam ion trap (EBIT) at the National Institute of Standards and … modeling, line identification, highly-charged ions … EUV Spectral Lines of Highly-Charged Hf, Ta and Au Ions Observed with an Electron Beam Ion Trap …

Effect of a Water Rinse on Labile Fluoride and Ether Ions in Plaque and Saliva Before and After Conventional and Experimental Fluoride Rinses

March 1, 2001
Author(s)
Gerald L. Vogel, Z Zhang, Laurence C. Chow, Gary E. Schumacher
… apparently due to water induced loss of calcium binding ions. Water- or fluoride-rinse-induced changes in plaque … caries, fluoride, labile ions, plaque, saliva … Effect of a Water Rinse on Labile Fluoride and Ether Ions in Plaque and Saliva Before and After Conventional and …

New Instruments to Calibrate Atmospheric Transmission

September 17, 2012
Author(s)
Claire E. Cramer, Keith R. Lykke, John T. Woodward IV, Peter Zimmer, John T. McGraw, Daniel C. Zirzow
… Claire E. Cramer , Keith R. Lykke , John T. Woodward IV , Peter Zimmer, John T. McGraw, Daniel C. Zirzow … Ground-based and Airborne Telescopes IV …

Direct Imaging of Highly Charged Ions in an Electron Beam Ion Trap

August 1, 2000
Author(s)
James V. Porto, I Kink, John D. Gillaspy
… We have directly observed the ion cloud distribution in an electron beam ion trap using … lines in the ground term of Ar 13+ ,^ Xe 31+ and Xe 32+ ions. Using a gated intensified charge coupled device camera, … provide infromation about the trapped highly charged ions which is difficult to obtain by other methods. To …

First principle simulation of ultra-cold ion crystals in a Penning trap with Doppler cooling and a rotating wall potential

July 17, 2019
Author(s)
Chen Tang, Dominic Meiser, John Bollinger, Scott E. Parker
… in a Penning trap with a rotating wall is presented. The ion dynamics is modelled classically. Both axial and planar … non-neutral plasma, Penning trap, rotating wall, trapped-ion crystals … First principle simulation of ultra-cold ion crystals in a Penning trap with Doppler cooling and a …

Versatile laser-free trapped-ion entangling gates

March 28, 2019
Author(s)
R. T. Sutherland, Raghavendra Srinivas, Shaun C. Burd, Dietrich Leibfried, Andrew C. Wilson, David J. Wineland, David T. Allcock, Daniel Slichter, S. B. Libby
… theory for laser-free entangling gates with trapped-ion hyperfine qubits, using either static or oscillating … Versatile laser-free trapped-ion entangling gates …

Genetically Engineered Metal Ion Binding Sites on the Outside of a Channel's Transmembrane B-Barrel

February 1, 1999
Author(s)
John J. Kasianowicz, D L. Burden, L C. Han, S Cheley, H Bayley
… engineered versions of the Staphlococcus aureus αHL} ion channel to serve as rationally designed sensor components … alpha-hemolysin, alpha-toxin, biosensor, divalent cations, ion channels, protein structure, transition metals … Genetically Engineered Metal Ion Binding Sites on the Outside of a Channel's Transmembrane …

K X-Rays Produced in Collisions of Bare Ions With Atoms Contribution of Multiple-Electron Transfer in Kr 36+ , Ar 18+ , and Ne 10+ + Ar Collisions

January 1, 2006
Author(s)
H Tawara, E Takacs, T Suta, K Makonyi, L P. Ratliff, John D. Gillaspy
… observed in low energy collisions of bare Kr, Ar, and Ne ions ion with neutral gas targets. Although largely … collisions, highly charged ions, hyper-satellite lines, satellite lines, x-ray … K X-Rays Produced in Collisions of Bare Ions With Atoms Contribution of Multiple-Electron Transfer in …

Identification of Active Sites of Biomolecules II: Saccharide and Transition Metal ion in Aqueous Solution

February 23, 2009
Author(s)
Orkid Coskuner, Denis E. Bergeron, Luis C. Rincon, Jeffrey W. Hudgens, Carlos A. Gonzalez
… dynamics (CPMD) simulations find that a single FeIII ion interacts with specific hydroxyl groups of the saccharide … in aqueous solution. Specifically, we find that one FeIII ion complexed to methyl-a-mannopyranoside also associates … ionization mass spectrometry measurements involving guided ion beam hydration measurements, which reveal an optimal …

Neutron Depth Profiling Technique for Studying Aging in Li-ion Batteries

February 15, 2011
Author(s)
Robert G. Downing
… During operation of a Li-ion cell, lithium diffuses in and out of the solid phase … Lithium, battery, neutron depth profiling, aging, Li-ion cell, C-rate … Neutron Depth Profiling Technique for Studying Aging in Li-ion Batteries …

Quantitative secondary ion mass spectrometry imaging of self-assembled monolayer films for electron beam dose mapping in the environmental scanning electron microscope

July 1, 1998
Author(s)
John G. Gillen, Scott A. Wight, David S. Bright, T M. Herne
… at different levels of electron dose. Microbeam secondary ion mass spectrometry [SIMS] using Cs+ bombardment is then used to image the F- secondary ion signal from these areas. From the reduction in F- … curve is generated that allows conversion of secondary ion signal to electron dose on a pixel-by-pixel basis. Using …

Method for Evaluating Ion Mobility Spectrometers for Trace Detection of Fentanyl and Fentanyl- related Substances

November 8, 2019
Author(s)
Jennifer R. Verkouteren, Jeffrey Lawrence, R. Michael Verkouteren, Edward Sisco
… including law enforcement and border protection. Ion mobility spectrometry (IMS) technologies have a potential … cm2 V-1 s-1 for all 16 compounds indicate that product ion formation is the same across instrument platforms, and a … drug detection, fentanyl, IMS, ion mobility spectrometry, opioid …

Structure and Mechanical Properties of Al Thin Films Synthesized by Electron Beam Evaporation and Ion Beam Assisted Deposition

October 4, 2010
Author(s)
C E. Kalnas, David T. Read, J E. Jones, G S. Was
… The effects of an Ar ion assist beam during Al film growth by electron beam … nm were synthesized by electron beam evaporation (EBE) and ion beam assisted deposition (IBAD) at a nomalized energy … aluminum, ion bombardment, mechanical properties, microstructure … Al Thin Films Synthesized by Electron Beam Evaporation and Ion Beam Assisted Deposition …

Isotopic Metrology of Carbon Dioxide. II. Effects of Ion Source Materials, Conductance Emission, and Accelerating Voltage on Dual-Inlet Cross Contamination

June 1, 2003
Author(s)
R M. Verkouteren, S Assonov, D Klinedinst, W Brand
… isotope carbon dioxide measurements, made before and after ion source modification to gas isotope ratio mass … protocols were designed to explore the effects of ion surce material substitution, source conductance, inlet … times greater than 15 s, and different settings of ion source conductance resulted in delta- 13C shifts of about …

Electron Attachment Cross Sections and Negative Ion States of SF6

January 1, 2001
Author(s)
Loucas G. Christophorou, James K. Olthoff
… the energies and symmetry assignments of the negative ion states of SF 6 below approximately equal to}15 eV. … electron attachment, electron scattering, negative ion states, SF 6 , sulfur hexafluoride … Electron Attachment Cross Sections and Negative Ion States of SF6 …

Determination of the isotopic change in nuclear charge radius from extreme-ultraviolet spectroscopy of highly charged ions of Xe

June 16, 2020
Author(s)
Yuri Ralchenko, Roshani Silwal, A. Lapierre, John Gillaspy, Joan M. Dreiling, S A. Blundell, Dipti Goyal, A. Borovik, Jr., G Gwinner, A.C.C. Villari, Endre Takacs
… that extreme ultraviolet spectroscopy of highly charged ions is a precise method for measurements of changes in the … from extreme-ultraviolet spectroscopy of highly charged ions of Xe …

Quantum Control, Quantum Information Processing, and Quantum-Limited Metrology With Trapped Ions

June 19, 2005
Author(s)
David J. Wineland, Dietrich G. Leibfried, Murray D. Barrett, A. Ben-Kish, James C. Bergquist, Brad R. Blakestad, John J. Bollinger, Joseph W. Britton, J Chiaverini, B. L. DeMarco, David Hume, Wayne M. Itano, M J. Jensen, John D. Jost, Emanuel H. Knill, Jeroen Koelemeij, C. Langer, Windell Oskay, R Ozeri, Rainer Reichle, Till P. Rosenband, Tobias Schaetz, Piet Schmidt, Signe Seidelin
… on quantum informaiton processing using trapped ions at NIST. A central theme of this work has been to … information processing, quantum-state engineering, trapped ions … Processing, and Quantum-Limited Metrology With Trapped Ions …

Formation of y+10 and y+11 Ions in the Collision-Induced Dissociation of Peptide Ions

December 8, 2011
Author(s)
Lisa E. Kilpatrick, Pedatsur Neta, Xiaoyu Yang, Yamil Simon, Yuxue Liang, Stephen E. Stein
… Tandem mass spectra of peptide ions, acquired in shotgun proteomic studies of selected … that cannot be assigned to the known fragmentation product ions (y, b, a, neutral losses). In many cases these persist … synthesized peptides, we report on a new class of fragment ions corresponding to y n-1 +10 and y n-1 +11, where n is the …

Laser-free trapped-ion entangling gates with simultaneous insensitivity to qubit and motional decoherence

April 29, 2020
Author(s)
R. T. Sutherland, Raghavendra Srinivas, Shaun C. Burd, Hannah Knaack, Andrew C. Wilson, David J. Wineland, Dietrich Leibfried, David T. Allcock, Daniel Slichter, S. B. Libby
… for state-of-the-art implementations of laser-free trapped-ion entangling gates are decoherence of the qubit state and … Laser-free trapped-ion entangling gates with simultaneous insensitivity to qubit …
Displaying 376 - 400 of 2904
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