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Search Publications

NIST Authors in Bold

Displaying 351 - 375 of 4258

Tools and Procedures for Quantitative Microbeam Isotope Ratio Imaging by Secondary Ion Mass Spectrometry

July 1, 2003
Author(s)
John G. Gillen, David S. Bright
… In this work we demonstrate the use of secondary ion mass spectrometry (SIMS) combined with the Lispix image … Mg isotopic ratios. Using 19.5 keV impact O- primary ion bombardment and detection of positive secondary ions, … isotope ratio, isotope ratio imaging, secondary ion imaging, secondary ion mass spectrometry, surface analysis …

Measurements of Particle Formation in Flames Inhibited by Iron Pentacarbonyl

March 14, 1999
Author(s)
M D. Rumminger, Gregory T. Linteris
… than halogen-containing compounds. In particular, iron pentacarbonyl (Fe(CO)5) was found to be one of the … critical part of the research on Fe(C0)5 is to understand iron pentacarbonyl's diminishing effectiveness at high mole … suppressants. A plausible but unconfirmed explanation for iron pentacarbonyl's reduced effectiveness under certain …

Measuring Ion-Pairing and Hydration in Variable Charge Supramolecular Cages with Microwave Microfluidics

May 17, 2019
Author(s)
Angela C. Stelson, Cynthia M. Hong, Mitchell C. Groenenboom, Charles A. Little, James C. Booth, Nathan D. Orloff, Robert G. Bergman, Kenneth N. Raymond, Kathleen A. Schwarz, F. D. Toste, Christian J. Long
… use microwave microfluidics to measure the hydration and ion pairing properties of two tetrahedral metal–organic cage … broadband measurements, we extract hydration numbers and ion pairing dynamics for the cages. We find that the cage … cage is more strongly hydrated and forms a more solvated ion pair compared to the K12(Ga4L6) cage. We show that …

Spectrum Simulation in DTSA-II

October 1, 2009
Author(s)
Nicholas W. Ritchie
… to optimize the tools for the optimal measurement. DTSA-II provides both easy to use and flexible tools for … sophisticated models of arbitrarily complex samples. DTSA-II provides a broad range of simulation tools in a framework … interchangeable physical models. In addition, DTSA-II provides tools for visualizing, comparing, manipulating …

High resolution X-ray Spectra of the Time Evolution of Emission from Metastable Electronic States of Highly Charged Ni-like Ions

June 25, 2024
Author(s)
Timothy Burke, Endre Takacs, Dipti Dipti, Adam Hosier, Galen O'Neil, Hunter Staiger, Joseph N. Tan, Aung S. Naing, Joan Marler, Yuri Ralchenko
… Metastable levels of highly charged ions that can only decay via highly forbidden transitions can … 1 2 )J=3 magnetic octupole (M3) transition in nickel-like ions can result in a large metastable population of its upper … to study metastable electronic states in highly charged ions (HCIs) that decay by x-ray emission in electron beam ion …

Electrostatic Influence on Ion Transport through the alpha HL Channel

October 1, 2003
Author(s)
M Misakian, John J. Kasianowicz
… The model demonstrates that rectification fo monovalent ion flow through the αHL channel can be related to the … alpha hemolysin, alpha toxin, electrostatics, ion channel, Nernst-Planck analysis … Electrostatic Influence on Ion Transport through the alpha HL Channel …

Exponentially correlated Hylleraas-Configuration Interaction studies of atomic systems. II. Non-relativistic energies of the 1 singlet S through 6 singlet S states of the Li+ ion

October 15, 2021
Author(s)
Maria B. Ruiz, James S. Sims, Bholanath Padhy
… examine not only the ground 1 singlet S state of the Li+ ion, but the 2 singlet S through 6 singlet S excited states … Lithium ion, non-relativistic energy, singlet S states, Hy-CI, E-Hy-CI … Interaction studies of atomic systems. II. Non-relativistic energies of the 1 singlet S through 6 …

High Precision Measurements of Arsenic and Phosphorous Implantation Dose in Silicon by Secondary Ion Mass Spectrometry

June 1, 2002
Author(s)
P Chi, David S. Simons, J M. McKinley, F A. Stevie, C N. Granger
… to be accomplished with low systematic error. Secondary ion mass spectrometry (SIMS) has demonstrated the capability … that were investigated include analytical species, matrix ion species, energy bandpass, and sample holder design. With … energy distribution, high precision measurement, ion implentation, secondary ion mass spectrometry, …

Real-time measurements of plasma photoresist modifications: The role of plasma vacuum ultraviolet radiation and ions

May 23, 2012
Author(s)
Weilnboeck Florian, Nirav Kumar, Gottlieb Oehrlein, Ting-Ying Chung, D Graves, Mingqi Li, Eric A. Hudson, Eric C. Benck
… interactions of surface modifications introduced by ions, bulk material modifications by ultraviolet (UV)/vacuum … work identified the individual contributions of energetic ions and UV/VUV radiation, the dynamics of the concurrent … We studied the interactions of plasma radiation and ions with 193nm PR and 248nm PR in Ar plasma by in-situ …

Surface science motivated by heating of trapped ions from the quantum ground state

October 25, 2021
Author(s)
Dustin Hite, Kyle McKay, David P. Pappas
… past two and a half decades, anomalous heating of trapped ions from nearby electrode surfaces has continued to … Caused by electric-field noise, this heating of the ions' motional modes remains an obstacle for scalable quantum computation with trapped ions. One of the anomalous features of this electric-field …

Anisotropic Spin Fluctuations in Detwinned FeSe

July 1, 2019
Author(s)
Tong Chen, Youzhe Chen, Andreas Kreisel, Xingye Lu, Astrid Schneidewind, Yiming Qiu, J. T. Park, Toby G. Perring, J. Ross Stewart, Huibo Cao, Rui Zhang, Yu Li, Yan Rong, Yuan Wei, Brian M. Andersen, P. J. Hirschfeld, Collin L. Broholm, Pengcheng Dai
… Superconductivity in iron selenide (FeSe) emerges from a nematic phase that breaks four-fold rotational symmetry in the iron plane [Fig. 1(a)] [1-4]. Although this phase in FeSe is … superconductivity, iron selenide, spin fluctuation …

Domain effects in faraday effect sensors based on iron garnets

January 1, 1992
Author(s)
M. N. Deeter
… sensors which employ thick films and bulk crystals of iron · garnets produce fundamentally different responses. Iron garnet films with uniaxial magnetic anisotropy exhibit … Domain effects in faraday effect sensors based on iron garnets …

Trapped electrons and ions as particle detectors

August 5, 2021
Author(s)
Jacob Taylor, Daniel Carney, Hartmut Haffner, David Moore
… Electrons and ions trapped with electromagnetic fields have long served as … Trapped electrons and ions as particle detectors …

State Readout of a Trapped Ion Qubit Using a Trap-integrated Superconducting Photon Detector

January 6, 2021
Author(s)
Susanna L. Todaro, Varun Verma, Katherine C. McCormick, David T. Allcock, Richard Mirin, David J. Wineland, Sae Woo Nam, Andrew C. Wilson, Dietrich Leibfried, Daniel Slichter
… detect fluorescence photons emitted by a single $^9$Be$^+$ ion confined in a surface- electrode rf ion trap, using a superconducting nanowire single photon … optical pumping into the fluorescing state. We use the ion fluorescence to perform an absolute calibration of the …
Displaying 351 - 375 of 4258
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