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Search Publications

NIST Authors in Bold

Displaying 401 - 425 of 3311

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 …

New Equations for the Sublimation Pressure and Melting Pressure of H2O Ice Ih

December 17, 2011
Author(s)
Wolfgang Wagner, T Riethmann, Rainer Feistel, Allan H. Harvey
… the entire melting curve from 273.16 K to the ice Ih-ice III-liquid triple point at 251.165 K. For completeness, we also give the IAPWS melting-pressure equation for ice III, which is slightly adjusted to agree with the ice Ih … ice Ih, ice III, ice V, ice VI, ice VII, melting-pressure equation, …

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 …

SURF III - A New Electron Storage Ring at NIST

October 15, 1999
Author(s)
R A. Bosch, D E. Eisert, Mitchell L. Furst, R M. Graves, L Greenler, A D. Hamilton, L R. Hughey, R P. Madden, P Robl, Ping-Shine Shaw, W S. Trzeciak, Robert E. Vest, D Wahl
… its spectral range, SURF II has been converted to SURF III, commissioned in December 1998. The design and … by PSL and the Synchrotron Radiation Center at UW. SURF III remains a weak-focusing, single-magnet storage ring with … SURF III - A New Electron Storage Ring at NIST …

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 …

Focused Ion Beam-Induced Displacive Phase Transformation From Austenite to Martensite during Fabrication of Quenched and Partitioned Steel Micro-Pillar

January 5, 2020
Author(s)
Eun Jung Seo, Lawrence Cho, Jin Kyung Kim, Javad Mola, Lijia Zhao, Sukjin Lee, Bruno C. De Cooman
… and partitioned steel micro-pillars by using focused ion beam (FIB) technique. The BCC phase produced by the FIB … immediately after a FIB scan of the surface with the Ga+ ion beam. This report addresses challenges related to the … retained austenite, martensitic transformation, focused ion beam. …

Cluster Primary Ion Beam Secondary Ion Mass Spectrometry for Semiconductor Characterization

January 1, 2001
Author(s)
John G. Gillen, S V. Roberson, Albert J. Fahey, Marlon L. Walker, J Bennett, R Lareau
… We are evaluating the use of polyatomic and cluster primary ion beams for characterization of semiconductor materials by secondary ion mass spectrometry using both magnetic sector and time-of-flight SIMS instruments. Primary ion beams of SF 5 +, C 8 - and CsC 6 - have been used to …

Recent experiments in trapped-ion quantum information processing at NIST

May 1, 2006
Author(s)
J Chiaverini, Murray D. Barrett, Brad R. Blakestad, Joseph W. Britton, Wayne M. Itano, John D. Jost, Emanuel H. Knill, C. Langer, Dietrich G. Leibfried, R Ozeri, Tobias Schaetz, David J. Wineland
… Recent experiments in trapped-ion quantum information processing at NIST …

Recent experiments in trapped-ion quantum information processing at NIST

May 1, 2006
Author(s)
J Chiaverini, Matthew P. Barrett, Brad R. Blakestad, Joseph W. Britton, Wayne M. Itano, John D. Jost, Emanuel H. Knill, C. Langer, Dietrich G. Leibfried, R Ozeri, T Schaetz, David J. Wineland
… Recent experiments in trapped-ion quantum information processing at NIST …

Discriminative potential of ion mobility spectrometry for the detection of fentanyl and fentanyl analogues relative to confounding environmental interferents

September 27, 2019
Author(s)
Thomas Forbes, Jeffrey Lawrence, Jennifer R. Verkouteren, R. Michael Verkouteren
… discriminative potential, sensitivity and specificity, of ion mobility spectrometry (IMS) for the detection of fentanyl … in desorption and drift tube temperatures, reactant ion dopant chemistry, and analysis time. This work identified … Ion mobility spectrometry, Illicit narcotics, Fentanyl, …

On the Risk of False Positive Identification Using Multiple Ion Monitoring in Qualitative Mass Spectrometry: Large-Scale Intercomparisons With a Comprehensive Mass Spectral Library

June 1, 2006
Author(s)
Stephen E. Stein, David N. Heller
… out by comparing a few selected ions acquired by multiple ion monitoring (MIM), with due allowance for expected … roughly one order of magnitude for each additional ion selected. Our computations also showed that false … identification, mass spectral library, multiple ion monitoring (MIM), qualitative mass spectrometry …

A Critical Compilation of Experimental Data on the 1s2l2l0 Core-Excited States of Li-like Ions from Carbon to Uranium

October 7, 2022
Author(s)
Yuri Ralchenko, Alexander Kramida, Vladimir Azarov
… of energy levels of the 1s2l2l0 core-excited states for ions along the Li isoelectronic sequence from carbon to … levels of the 1s2l2l0 core-excited states of Li-like ions. The compiled experimental data include uncertainty … Spectroscopy, Energy Levels, Transition Energies, Li-like ions, Critical Compilation, Core-Excited States …

A Critical Compilation of Experimental Data on the 1s2l2l0 Core-Excited States of Li-like Ions from Carbon to Uranium

May 25, 2022
Author(s)
V. I. Azarov, Alexander Kramida, Yuri Ralchenko
… of energy levels of the 1s2l2l' core-excited states for ions along the Li isoelectronic sequence from carbon to … levels of the 1s2l2l' core-excited states of Li-like ions. The compiled experimental data include uncertainty … Spectroscopy, Energy Levels, Transition Energies, Li-like ions, Critical Compilation, Core-Excited States …

Solvation Structure of Ions in Water

February 14, 2007
Author(s)
Raymond D. Mountain
… Molecular dynamics simulations of ions in water are reported for solutionsof varying solute … trends inproperties as the size and charge density of the ions changes.The emphasis is on how the structure of water is modified by the presenceof the ions and how many water molecules are present in the first …

High Fidelity Universal Gate Set for 9Be+ Ion Qubits

August 4, 2016
Author(s)
John P. Gaebler, Ting R. Tan, Yong Wan, Yiheng Lin, Ryan S. Bowler, Adam C. Keith, Scott Glancy, Kevin Coakley, Emanuel Knill, Dietrich Leibfried, David J. Wineland
… High Fidelity Universal Gate Set for 9Be+ Ion Qubits …
Displaying 401 - 425 of 3311
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