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Search Publications

NIST Authors in Bold

Displaying 476 - 500 of 3756

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 …

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 …

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 …

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 …

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 …

Coherent coupling and non-destructive measurement of trapped-ion mechanical oscillators

July 29, 2024
Author(s)
Panyu Hou, Jenny Wu, Stephen Erickson, Daniel Cole, Giorgio Zarantonello, Adam Brandt, Andrew C. Wilson, Daniel Slichter, Dietrich Leibfried
… spectrally separated harmonic motional modes of a trapped-ion crystal. The timing, strength, and phase of the coupling … non-destructive projective measurement of a trapped-ion motional state. Our work enhances the suitability of trapped-ion motion for continuous-variable quantum computing and …

Development of Certified Reference Materials of Ion-Implanted Dopants in Silicon for Calibration of Secondary Ion Mass Spectrometers

January 1, 2007
Author(s)
David S. Simons, Robert G. Downing, George P. Lamaze, Richard M. Lindstrom, Robert R. Greenberg, Rick L. Paul, Susannah Schiller, William F. Guthrie
… dopant species that is introduced into a silicon wafer by ion implantation. The certified dose (atoms/cm2) of the … of dopant concentration measurements with secondary ion mass spectrometers. Certification measurements were … arsenic, boron, CRM, ion implantation, neutron activation analysis, phosphorus, …

Spectroscopy of atomic and molecular ions using quantum logic

June 25, 2006
Author(s)
Piet Schmidt, Till P. Rosenband, Jeroen Koelemeij, David Hume, Wayne M. Itano, James C. Bergquist, David J. Wineland
… developed techniques for quantum computation using trapped ions allow unprecedented coherent control of the internal and … to perform precision spectroscopy of atomic and molecular ions that have no accessible transition for laser cooling and … quantum superpositions, quantum-state engineering, trapped ions. …

High-accuracy optical clocks based on group 16-like highly charged ions

October 3, 2022
Author(s)
Saleh Allehabi, Samuel Brewer, Vladimir Dzuba, Victor Flambaum, Kyle Beloy
… transitions in group 16-like highly charged ions as candidates for high-accuracy optical clocks, … including S-, Se-, and Te-like systems. For this class of ions, the ground 3PJ fi ne structure manifold exhibits … properties important for optical clock development. All ions discussed are suitable for production in small-scale ion …
Displaying 476 - 500 of 3756
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