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 701 - 725 of 2769

Uranium Ion Yields from Monodisperse Uranium Oxide Particles

February 24, 2016
Author(s)
Nicholas E. Sharp, John D. Fassett, David S. Simons
… Secondary ion mass spectrometry (SIMS) plays an important role in … isotopic measurements. The influence of primary ion beam species and polarity on U+ sample utilization … [2]. However, the effect of sample substrate on uranium ion production efficiency and sputtering profile has not been …

The NIST EBIT; A Progress Report

January 1, 1993
Author(s)
John D. Gillaspy, J R. Roberts, Craig M. Brown, Uri Feldman
… (1993 publication) The invention of the Electron Beam Ion Trap (EBIT) at Livermore has marked the emergence of a … atoms, EBIT, electron beam ion trap, highly charged atoms …

High-Resolution Structural Study of Zinc Ion Incorporation at the Calcite Cleavage Surface

October 12, 2021
Author(s)
L Cheng, N Sturchio, Joseph Woicik, K Kemner, P Lyman, Michael Bedzyk
… used to determine the atomic-scale structure of the Zn 2+ ion incorporated at the CaCO 3 (1014) surface by adsorption … Zn-O nearest-neighbor distance. Relaxation of the Zn 2+ ion in the out-of-plane direction is indicated by the … High-Resolution Structural Study of Zinc Ion Incorporation at the Calcite Cleavage Surface …

Exfoliated transition metal dichalcogenide (TMD) nanosheets for supercapacitor and sodium ion battery applications

August 14, 2019
Author(s)
Jonathan Turley, Santanu Mukherjee, Elisabeth Mansfield, Jason Holm, Lamuel David, Gurpreet Singh
… regarding the safety, flammability and hazards posed by Li-ion systems has led to the research of alternative rechargeable metal-ion electrochemical storage technologies. Among the most notable of these are the Na-ion supercapacitors and batteries, motivated in part because …

Measurement of the 2P1/2-2P3/2 fine structure splitting in fluorine-like Kr, W, Re, Os and Ir

September 2, 2020
Author(s)
Galen O'Neil, Samuel C. Sanders, Paul Szypryt, Dipti Goyal, Amy Gall, Yang Yang, Samuel M. Brewer, William Doriese, Joseph Fowler, Daniel Swetz, Joseph Tan, Joel Ullom, Andrey V. Volotka, Endre Takacs, Yuri Ralchenko
… energy in F-like ions using the NIST electron beam ion trap and extreme-ultraviolet and x-ray spectrometers. … electrodynamics, fine structure splitting, electron beam ion trap, x-ray spectrometers …

Nanostructured dental composites and adhesives with antibacterial and remineralizing capabilities for caries inhibition

January 1, 2013
Author(s)
Hockin D. Xu, Lei Cheng, Michael D. Weir, Joseph M. Antonucci, Nancy Lin, Sheng Lin-Gibson, Laurence Chow
… and adhesives. Nanoparticles of amorphous calcium phosphate (NACP) and silver (NAg), and quaternary ammonium … properties, together with the previously-reported calcium phosphate ion release properties, is promising for caries-inhibiting …

Quantum information processing and multiplexing with trapped ions

January 1, 2003
Author(s)
David J. Wineland, Dietrich G. Leibfried, B. L. DeMarco, V Meyer, M A. Rowe, A Ben kish, Murray D. Barrett, Joseph W. Britton, J Hughes, Wayne M. Itano, Branislav M. Jelenkovic, Christopher Langer, D Lucas, Till P. Rosenband
… quantum-state synthesis and control of trapped atomic ions. This work has the overall goal of performing … information processing and multiplexing with trapped ions …

Towards quantum information with trapped ions at NIST

January 1, 2003
Author(s)
Dietrich G. Leibfried, B. L. DeMarco, V Meyer, M A. Rowe, A Ben-kish, Murray D. Barrett, Joseph W. Britton, J Hughes, Wayne M. Itano, Branislav M. Jelenkovic, Christopher Langer, D Lucas, Till P. Rosenband, David J. Wineland
… quantum-state synthesis and the control of trapped atomic ions. This work has the overall goal of performing … Towards quantum information with trapped ions at NIST …

Overview of Recent Atomic Spectroscopy At The NIST EBIT

May 5, 2012
Author(s)
John Gillaspy
Seven papers published by the NIST EBIT spectroscopy team and collaborators from mid-2009 to mid-2011 are summarized. Previous discussions of the D-lines in Na-like ions and the Lyman-alpha lines in H-like ions are updated with new information. Nine issues

Phase-coherent detection of an optical dipole force by Doppler velocimetry

May 10, 2011
Author(s)
Michael J. Biercuk, Hermann Uys, Joseph W. Britton, Aaron Vandevender, John J. Bollinger
… Doppler detection of optical dipole forces using large ion crystals in a Penning trap. The technique is based on … in 9Be+ near 313 nm and the center-of-mass (COM) ion motional mode. The optical dipole force is tuned to … detailed characterization of motional modes in complex ion crystals and provides frequency discrimination below the …

Classical Trajectories and RRKM Modeling of Collisional Excitation and Dissociation of Benzylammonium and tert Butyl Benzylammonium Ions in a Quadrupole-Hexapole-Quadrupole Tandem Mass Spectrometer

March 1, 2010
Author(s)
Vadim D. Knyazev, Stephen Stein
… of the benzylammonium and the 4-tert butyl benzylammonium ions was studied experimentally in an electrospray ionization … were determined as functions of the kinetic energy of ions and the collider gas (argon) pressure. A theoretical … of the trajectories of the parent and the product ions flight through the hexapole collision cell, …

Scalable arrays of doped silicon RF Paul traps

October 26, 2009
Author(s)
Joseph W. Britton, Dietrich G. Leibfried, James A. Beall, Brad R. Blakestad, Janus H. Wesenberg, David J. Wineland
… and a multi-zone surface-electrode trap. From the measured ion motional heating rate we determine an electric field spectral density at the ion of approximately 1 × 10 -10 (V /m) 2 Hz −1 at ωz /2π {math equals} 1.125 MHz when the ion lies 40 υm above the electrode surface. One application …

3D Molecular Imaging SIMS

July 1, 2006
Author(s)
John G. Gillen, Albert J. Fahey, M Wagner, Christine M. Mahoney
… analyzed by dynamic SIMS using SF 5 + polyatomic primary ion bombardment. Each of these systems exhibited minimal … through the depth of the film. By combing secondary ion imaging with depth profiling, 3-dimensional molecular … sections are cut in the samples with the SF5+ primary ion beam to produce a laterally magnified cross section of …

Computational study of the dielectric properties of [La,Sc] 2 O 3 solid solutions

July 11, 2010
Author(s)
Hiroyoshi Momida, Eric J. Cockayne, Naoto Umezawa, Takahisa Ohno
… predicted at small Sc concentrations due to the rattling ion effect. Similar calculations for a model amorphous La2O3 … the Sc changes in a way that compensates for the rattling ion effect. … gate dielectrics, high-k dielectrics, rattling ion effect …

Collisional Electron-Detachment and Ion Conversion Processes in SF6

November 1, 1990
Author(s)
James K. Olthoff, Richard J. Van Brunt, Yicheng Wang, L. D. Doverspike, R. Champion
… 6th Intl. Swarm Seminar entitled Nonequilibrium Effects in Ion and Electron Transport, … Collisional Electron-Detachment and Ion Conversion Processes in SF6 …

Fabrication of Lithium Indolide and Derivates for Ion Conduction

September 14, 2022
Author(s)
Jintao Wang, Yang Yu, Anan Wu, Khai Chen Tan, Hui Wu, Teng He, Ping Chen
… Alkali-ion batteries have been widely used nowadays. The development … derivates show pronounced ionic conductivities, e.g., the ion conductivity of sodium carbazolide ditetrahydrofuran … Fabrication of Lithium Indolide and Derivates for Ion Conduction …

A single-atom optical clock with high accuracy

July 14, 2006
Author(s)
Windell Oskay, Scott A. Diddams, Elizabeth A. Donley, Tara M. Fortier, Thomas P. Heavner, Leo W. Hollberg, Wayne M. Itano, Steven R. Jefferts, M J. Jensen, Kyoungsik Kim, F Levi, Thomas E. Parker, James C. Bergquist
… transition in a single, laser-cooled, trapped mercury ion. In this comparison, the fractional systematic frequency … conclusively that frequency control in the mercury-ion system is possible at a level superior to that of the … cesium fountain, femtosecond laser frequency comb, mercury-ion frequency standard, optical frequency standard, …
Displaying 701 - 725 of 2769
Was this page helpful?