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 1201 - 1225 of 4634

Quadruply-ionized barium as a candidate for a high-accuracy optical clock

October 23, 2020
Author(s)
Kyle Beloy, Vladimir A. Dzuba, Samuel Brewer
… calculations to determine relevant properties of this ion. The lifetime of the excited clock state is found to be … accommodating low statistical uncertainty with a single ion for practical averaging times. The differential static … atomic clock, highly-charged ion, ion clock, optical clock, optical frequency standard …

Thickness Dependence of Magnetic Film Edge Properties in Ni 80 Fe 20 Stripes

October 16, 2008
Author(s)
Robert D. McMichael, C A. Ross, V P. Chuang
Measurements of trapped spinwave edge modes in transversely magnetized stripe arrays of Ni80Fe20 largely confirm pervious theoretical predictions for the thickness dependence of the edge saturation field Hsat and the effective out-of-plane edge anisotropy

Hyperbranched Poly(ethylene oxide) Electrolytes for Lithium Ion Batteries

May 17, 2011
Author(s)
Christopher L. Soles, Kirt A. Page, Huagen H. Peng
… PEO polymers to act as a polyelectrolyte for Li-ion batteries. Hyperbranching has been shown to lead to a 100 fold increase in the ion conductivity below the melting temperature of the PEO … Hyperbranched Poly(ethylene oxide) Electrolytes for Lithium Ion Batteries …

Influence of Ion Solvation on the Properties of Electrolyte Solutions

April 3, 2018
Author(s)
Marat Andreev, Juan J. DePablo, Alexandros Chremos, Jack F. Douglas
… and surface tension. Based on our model, we find that ion-specific effects on thermodynamics properties and by … of electrolyte solutions, derive primarily from the ion-solvation. … Influence of Ion Solvation on the Properties of Electrolyte Solutions …

Depth Profiling of 4-Acetamindophenol-Doped Poly(lactic acid) Films Using Cluster Secondary Ion Mass Spectrometry

June 1, 2004
Author(s)
Christine M. Mahoney, S V. Roberson, John G. Gillen
… The feasibility of cluster Secondary Ion Mass Spectrometry (SIMS) for depth profiling of drug … biodegradable polymer films under dynamic SF 5 + primary ion bombardment was investigated including several films … polymer films showed very little degradation in secondary ion signal as a function of increasing primary ion dose, and …

Estimation of the Neutron Lifetime: Comparison of Methods Which Account for Background

June 1, 2002
Author(s)
Kevin J. Coakley, Grace L. Yang
… of each run of a neutron lifetime experiment, a magnetic trap is filled with neutrons. In the second stage of each … only background signals are measured after refilling the trap. In one approach, the mean lifetime of the neutron is … lifetime estimate in terms of the time spent filling, the trap, T f , the time spent observing decay events, T d , and …

Isotopic Metrology of Carbon Dioxide. I. Interlaboratory Comparison and Empirical Modeling of Inlet Equilibration Time, Inlet Pressure, and Ion Source Conductance

June 1, 2003
Author(s)
R M. Verkouteren, C E. Allison, S A. Studley, K J. Leckrone
… were designed to explore the effects of sample size, ion source conductance, and inlet changeover equilibration … carbon dioxide, gas isotope ratio mass spectrometer, GIRMS, ion source materials, isotopic measurements … Modeling of Inlet Equilibration Time, Inlet Pressure, and Ion Source Conductance …

Design and Characterization of a Photometer--Colorimeter Standard

May 1, 2004
Author(s)
George P. Eppeldauer, M Racz
… package, are used to match the responsivity of a Si tunnel-trap detector to the CIE color matching functions with small … values (f i '). Design considerations to extend the tunnel-trap detector with replaceable single and double apertures … luminance, photometer, spectral responsivity, standard, trap detector, tristimulus …

Design and Characterization of a Photometer/Colorimeter Standard

August 1, 2003
Author(s)
J Racz, George P. Eppeldauer
… package, are used to match the responsivity of a Si tunnel-trap detector to the CIE color matching functions with small … values (fi). Design considerations to extend the tunnel-trap detector withreplaceable single and double apertures and … luminance, photometer, spectral responsivity, standard, trap detector, tristimulus …

A Quantum Approximate Optimization Algorithm in a Trapped-Ion Quantum Simulator

October 13, 2020
Author(s)
Guido Pagano, Aniruddha Bapat, Patrick Becker, Kate Collins, Arinjoy De, Paul Hess, Harvey Kaplan, Antonis Kyprianidis, Wen Lin Tan, Christopher Baldwin, Lucas Brady, A Deshpande, Fangli Liu, Stephen Jordan, Alexey Gorshkov, C Monroe
… A Quantum Approximate Optimization Algorithm in a Trapped-Ion Quantum Simulator …

High-contrast dark resonances with linearly polarized light on the D 1 line of alkali atoms with large nuclear spin

February 20, 2009
Author(s)
Ken-ichi Watabe, Takeshi Ikegami, Akifumi Takamizawa, Shinya Yanagimachi, Shin-ichi Ohshima, Svenja A. Knappe
High-contrast coherent population trapping signal was observed on the Cs-D1 line using a bichromatic linear polarized light (lin||lin) field. The maximum absorption contrast of about 10% was obtained was nearly two times higher than that measured with the

Atoms on Demand: Fast, Deterministic Production of Single Cr Atoms

May 5, 2003
Author(s)
S Hill, Jabez J. McClelland
… of the loading and loss processes of a magneto-optic trap. We observe single-atom trap occupation probabilities as high as (98.7 plus or minus} … deterministic atom source, laser cooling, magneto-optical trap, single atom source …

Field-induced dehydration and optimal ionic escape paths for C2N membranes

June 11, 2021
Author(s)
Miroslav Barabash, William Gibby, Dmitry Luchinsky, Binquan Luan, Alexander Smolyanitsky, Peter McClintock
… Most analytic theories describing electrostatically driven ion transport through water-filled nanopores assume that the … the specific field-induced phenomena arising during ion transport. Here we consider an atomistic model of electrostatically driven ion permeation through subnanoporous C2N membranes. We …
Displaying 1201 - 1225 of 4634
Was this page helpful?