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Displaying 326 - 350 of 3756

Spectroscopic analysis of N-intrashell transitions in Rb-like to Ni-like Yb ions

June 9, 2020
Author(s)
Dipti Goyal, R. Silwal, Joan M. Dreiling, Samuel C. Sanders, Endre A. Takacs, Yuri Ralchenko
… Extreme ultraviolet spectra of highly-charged ytterbium ions produced in an electron beam ion trap at National … were identi ed in Rb-like Yb33+ through Ni-like Yb42+ ions. The e ects of strong con guration interaction within … Spectroscopy, electron beam ion trap, highly-charged ions, ytterbium, collisional-radiative modeling …

Trapped Ions, Entanglement, and Quantum Computing, ed. by B.L. Fearey

January 1, 1998
Author(s)
C J. Myatt, B E. King, D Kielpinski, Dietrich Leibfried, Q A. Turchette, Chris S. Wood, Wayne M. Itano, C Monroe, David J. Wineland
… range of 5-20 MHz. The equilibrium positions of pairs of ions that are crystallized in this trap lie along the long … potential to the trap, the micromotion of two crystallized ions may be reduced relative to the case of pure rf … a scheme to use this effect to differentially address the ions. …

Experimental Characterization of the Advanced Liquid Hydrogen Cold Neutron Source Spectrum of the NBSR Reactor at the NIST Center for Neutron Research

August 1, 2015
Author(s)
Jeremy C. Cook, John G. Barker, J. Michael Rowe, Robert E. Williams, Cedric V. Gagnon, Richard M. Lindstrom, Richard Michael Ibberson, Dan A. Neumann
… experimental characterization of the Advanced Liquid Hydrogen Cold Neutron Source brightness to date. Measurements … at reactor startup. Prior to the latter measurement the hydrogen was maintained in a liquefied state for an extended … attempt to observe the anticipated growth of the ortho (0)-hydrogen concentration following startup. Since papra …

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 …

Crystal Structure of Strontium Potassium Arsenate Octahydrate

September 1, 1998
Author(s)
M Mathew
… to define the host lattice, which accommodates the AsO 4 ion in the interstitial space. The environment of the AsO 4 … water molecules; each oxygen atom is the acceptor in four hydrogen bonds from four water molecules. The pair distances … Each water molecule is coordinated to one Sr and one K and hydrogen bonded to two O atoms of two different AsO 4 ions. …

Dissipative preparation of W states in trapped ion systems

July 2, 2021
Author(s)
Daniel Cole, Jenny Wu, Stephen Erickson, Panyu Hou, Andrew C. Wilson, Dietrich Leibfried, Florentin Reiter
… protocols for dissipative entanglement of three trapped-ion qubits, and we discuss in detail a scheme that uses … to generate one of six target W states in a three-ion qubit space. Using a beryllium-magnesium ion crystal as an example system, we theoretically …

Optical cell for combinatorial in situ Raman spectroscopic measurements of hydrogen storage materials at high pressures and temperatures

March 10, 2011
Author(s)
Jason Hattrick-Simpers, Wilbur S. Hurst, James E. Maslar, Sesha S. Srinivasan
… backscattering Raman spectroscopic measurements of hydrogen storage materials at pressures up to 10 MPa and … measurements of the Ca(BH4)2 and nano LiBH4 – LiNH2 – MgH2 hydrogen storage systems at elevated temperatures and … hydrogen storage, in situ spectroscopy, complex hydride …

Behavior of molecules and molecular ions near a field emitter

March 18, 2016
Author(s)
Ann C. Chiaramonti Debay, Baptiste Gault, Michael Ashton, Susan B. Sinnott, Michael P. Moody, David W. Saxey, D. K. Schreiber
… APT experiments often incorporate the detection molecular ions emitted from the specimen, in particular from covalently … an APT experiment by dissociation of metastable molecular ions. … Behavior of molecules and molecular ions near a field emitter …

Intercombination and Forbidden Transition Rates in C- and N-Like Ions (O 2+ , F 3+ and S 9+ ) Measured at a Heavy-Ion Storage Ring

August 1, 2000
Author(s)
E Trabert, A G. Calamai, John D. Gillaspy, G Gwinner, X Tordoir, A Wolf
… between the levels of the ground state in C-like ions of O and F and in N-like ions of S have been measured optically at a heavy-ion storage ring. The lifetime results, 1.250(13) ms for the … excited-state lifetime, Fluorine, highly-charged ion, oxygen, storage ring, sulfur, ultraviolet …

Imaging Nanophotonic Modes of Microresonators using a Focused Ion Beam

January 15, 2016
Author(s)
Kevin A. Twedt, Jie J. Zou, Marcelo I. Davanco, Kartik A. Srinivasan, Jabez J. McClelland, Vladimir A. Aksyuk
… local optomechanical perturbation using a focused lithium ion beam. An ion beam (radius ≈50 nm) induces a picometer-scale dynamic … Our technique also enables in-situ observation of ion implantation damage and relaxation dynamics in a silicon … microresonators, focused ion beams, optomechanics …

Hydrogen Dynamics in Laves-Phase Hydride YFe 2 H 2.6 : Inelastic and Quasielastic Neutron Scattering Studies

May 15, 2014
Author(s)
A. V. Skripov, V. Paul-Bancour, Terrence J. Udovic, John J. Rush
… The vibrational spectrum of hydrogen and the parameters of H jump motion in the C15-type … and quasielastic neutron scattering. It is found that hydrogen atoms occupying tetrahedral interstitial g (Y 2 Fe 2 … K to 240 K, respectively. Our results also indicate that hydrogen dynamics in YFe 2 H 2.6 is affected by considerable …

Highly Charged Ion Bombardment of Silicon Surfaces

August 1, 2003
Author(s)
J E. Sanabia, S N. Goldie, L P. Ratliff, Lori S. Goldner, John D. Gillaspy
… In an attempt to verify these results, highly charged ion-irradiated silicon samples were prepared at the Electron Beam Ion Trap facility at the National Institute of Standards and … cross section, fluorescence, highly charged ion, photoluminescence, silicon … Highly Charged Ion Bombardment of Silicon Surfaces …

Demonstration of a Chamber for Strain Mapping of Steel Specimens Under Mechanical Load in a Hydrogen Environment by Synchrotron Radiation

June 4, 2018
Author(s)
Matthew J. Connolly, Peter E. Bradley, Damian S. Lauria, Andrew J. Slifka, Elizabeth S. Drexler
… measurements of lattice strain for specimens in hydrogen gas under mechanical load. The chamber is suitable … Synchrotron x-ray radiographs of a fatigue crack grown in hydrogen are shown. Diffraction patterns show high … Fatigue, Fracture, Diffraction, Lattice Strain, Hydrogen, Fatigue Crack Growth, Synchrotron X- rays …

Communication-Comparison of Nanoscale Focused Ion Beam and Electrochemical Lithiation in beta-Sn Microspheres

December 5, 2016
Author(s)
Saya Takeuchi, William R. McGehee, Jennifer L. Schaefer, Truman M. Wilson, Kevin A. Twedt, Christopher L. Soles, Vladimir P. Oleshko, Eddie H. Chang, Jabez J. McClelland
… The development of Li focused ion beams (Li-FIB) enables controlled Li ion insertion into materials with nanoscale resolution. We … establishing the relevance of the Li-FIB for studies of ion dynamics in electrochemically active materials by … Li-FIB, lithium-ion battery, Sn …

Ion Coulomb crystals: an exotic form of condensed matter

August 24, 2025
Author(s)
Giovanna Morigi, John Bollinger, Michael Drewsen, Daniel Podolsky, Efrat Shimshoni
… fluorescence. These unique and unusual properties make ion crystals a powerful platform for studying phases of … theoretical framework and experimental characterization of ion Coulomb crystals from a condensed-matter perspective. We … exploring novel condensed matter phenomena with trapped ion crystals, as well as their many scientific and technical …

A Critical Compilation of Experimental Data on Spectral Lines and Energy Levels of Hydrogen, Deuterium, and Tritium

June 1, 2010
Author(s)
Alexander Kramida
… the standard source of reference data for the spectra of hydrogen and its isotopes. In these compilations, theoretical … been given. This reflects the fact that the theory of the hydrogen spectrum has been perfected to an extent far … work compiles several tens of recent measurements of the hydrogen, deuterium, and tritium fine and hyperfine structure …

Designing artificial cells to harness the biological ion gradient

November 23, 2008
Author(s)
Jian Xu, David A. LaVan
… contain numerous natural nanoscale conductors, i.e. ion channels and ion pumps1-4, that work in concert to form transmembrane or transcellular ion gradients that can be triggered to release an action … electrocyte, ion channel, artificial cell, nanoconductor, biological …

Surface science for improved ion traps

September 30, 2013
Author(s)
David P. Pappas, Dustin Hite, Andrew C. Wilson, David T. Allcock, David J. Wineland, Dietrich Leibfried, Yves Colombe
… This noise has been an obstacle to progress in trapped-ion quantum information processing (QIP) experiments for more … sources. Experimental evidence of its dependence on ion-electrode distance, frequency, and electrode temperature … that it may not be a fundamental limit to trapped-ion QIP. Moreover, the extreme sensitivity of trapped ions to …

Al, B, and Ga Ion-Implantation Doping of SiC

November 1, 2000
Author(s)
E Handy, M V. Rao, O W. Holland, P Chi, K A. Jones, M A. Derenge, R D. Vispute, T Venkatesan
… A Series of single energy Al, B, and Ga ion implants were performed in the energy range 50 keV - 4 … to characterize the implant depth profiles using secondary ion mass spectrometry (SIMS). From the implant depth profiles … A1N, diffusion, Ion Implantation, SiC, SIMS …

Lipid Nanodomains Change Ion Channel Function

August 22, 2017
Author(s)
Michael NMN Weinrich, David Worcester, Sergey M. Bezrukov
… modulate protein function, but evidence for modulation of ion channels is lacking. Here we show in a cholesterol-rich … the dissociation kinetics of the gramicidin dimer, a model ion channel. … Lipid Rafts, Lipid Domains, Ion Channels, Lipid Phases, Nanodomains … Lipid Nanodomains Change Ion Channel Function …

Toward Spin Squeezing with Trapped Ions

September 23, 2010
Author(s)
John J. Bollinger, Hermann Uys, Michael Biercuk, Joseph W. Britton
… implementing spin squeezing with a cloud of beryllium ions in a Penning ion trap, via the geometric phase gate used … Toward Spin Squeezing with Trapped Ions …
Displaying 326 - 350 of 3756
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