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Displaying 151 - 175 of 4632

Introduction of nanoscale positive controls for nanotoxicology: A new aspect of utilization of stability-enhanced Gold-Polyethyleneimine conjugates (Au-PEIs)

November 8, 2022
Author(s)
Tae Joon Cho, Vincent A. Hackley, Vytas Reipa, Alessandro Tona, Christopher Sims, Natalia Farkas
… Polyethyleneimine (PEI) conjugated gold nanoparticles (Au-PEIs) have potential use as positively charged gold nanoparticles (AuNPs) for nanomedical applications, due … gold nanoparticles, polyethyleneimine, colloidal stability, … A new aspect of utilization of stability-enhanced Gold-Polyethyleneimine conjugates (Au-PEIs) …

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. …

Analysis of EUV spectra from N-shell tungsten ions observed with an electron beam ion trap

July 3, 2018
Author(s)
Tapasi Das, Yuri Podpaly, Joseph Reader, John D. Gillaspy, Yuri Ralchenko
… Extreme ultraviolet spectra of highly charged tungsten ions were produced with an electron beam ion trap at the National Institute of Standards and … the ionization stages from Zr-like W34+ to Se-like W40+ ions were observed. Large-scale collisional-radiative …

EUV spectra of Rb-like to Cu-like gadolinium ions in an electron beam ion trap

October 8, 2012
Author(s)
Yuri Ralchenko, Deirdre Kilbane, G. O'Sullivan, John D. Gillaspy, Joseph Reader
… ultraviolet radiation from highly-charged gadolinium ions were made at the National Institute of Standards and Technology. The ions were produced and confined in an electron beam ion trap (EBIT) and the spectra were recorded with a … Gadolinium, highly-charged-ions, extreme-ultraviolet spectra, collisional-radiative …

Highly Charged Ions

January 1, 2001
Author(s)
John D. Gillaspy
… some of the fundamental properties of highly charged ions, the methods of producing them (with particular emphasis … charge-dependence, electron beam ion traps, highly charged ions, laboratory astrophysics, nanotechnology, nuclear … Highly Charged Ions …

Transition Energies of the D-lines in Na-like Ions

June 5, 2013
Author(s)
John D. Gillaspy, Dmitry D. Osin, Yuri Ralchenko, Joseph Reader, S A. Blundell
… the D1 (3s-3p1/2) and D2 (3s-3p3/2) transitions in Na-like ions of xenon, barium, samarium, gadolinium, dysprosium, … that we are aware of for QED in highly charged Na-like ions. It is also sensitive to retardation effects due to the … atomic spectroscopy, highly charged ions, quantum electrodynamics, electron beam ion trap …

Exposure of Self-Assembled Monolayers to Highly Charged Ions and Metastable Ions

July 1, 1999
Author(s)
L P. Ratliff, Ronaldo Minniti, A Bard, E W. Bell, John D. Gillaspy, D Parks, A J. Black, G M. Whitesides
… metastable argon atoms (Ar*) and highly charged xenon ions (HCIs) required to damage self-assembled monolayers … dose, highly charged ions, metastable ions, patterning, self-assembled monolayers, surface … Exposure of Self-Assembled Monolayers to Highly Charged Ions and Metastable Ions …

Direct Imaging of Highly Charged Ions in an Electron Beam Ion Trap

August 1, 2000
Author(s)
James V. Porto, I Kink, John D. Gillaspy
… observed the ion cloud distribution in an electron beam ion trap using visible and ultraviolet fluorescence from … lines in the ground term of Ar 13+ ,^ Xe 31+ and Xe 32+ ions. Using a gated intensified charge coupled device camera, … provide infromation about the trapped highly charged ions which is difficult to obtain by other methods. To …

Trapped-Ion Quantum Simulator,

January 1, 1998
Author(s)
David J. Wineland, C Monroe, Wayne M. Itano, B E. King, Dietrich G. Leibfried, C J. Myatt, Chris S. Wood
… the quantized motional and internal states of a single trapped ion can be used to simulate the dynamics of other systems. We … can also be used to create entangled states of multiple trapped ions ; such states can be used to demonstrate … Trapped-Ion Quantum Simulator, …

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 …

VECSEL systems for generation and manipulation of trapped magnesium ions

November 8, 2016
Author(s)
Shaun C. Burd, David T. Allcock, Tomi Leinonen, Jussi-Pekka Penttinen, Daniel H. Slichter, Raghavendra Srinivas, Andrew C. Wilson, Robert Jordens, Micrea Guina, Dietrich G. Leibfried, David J. Wineland
… tasks for quantum information processing experiments with trapped magnesium ions. For photoionization of neutral magnesium, 570.6 nm … high resolution, Spectroscopy, ionization, Spectroscopy, trapped ion … VECSEL systems for generation and manipulation of trapped magnesium ions …

EUV magnetic-dipole lines from highly-charged high-Z ions with an open $3d$ shell

November 27, 2012
Author(s)
Yuri Ralchenko, John D. Gillaspy, Joseph Reader, Dmitry D. Osin
… and Technology was used to produce highly-charged ions of hafnium, tantalum and gold with an open $3d$ shell. The extreme-ultraviolet (EUV) spectra from these ions were recorded with a flat-field grazing-incidence … $3d^n$ configurations of the Co-like to K-like ions, were identified by comparing energy-dependent …

Relative range error evaluation of terrestrial laser scanners using a plate, a sphere, and a novel dual-sphere-plate target

July 21, 2017
Author(s)
Balasubramanian Muralikrishnan, Prem K. Rachakonda, Vincent D. Lee, Katharine M. Shilling, Daniel S. Sawyer, Geraldine S. Cheok
… The recently published ASTM E2938-15 mandates the use of a plate target for the relative range tests. While a plate target may reasonably be expected to produce distortion … we discuss relative range experiments performed using a plate target and then address the advantages and limitations …

Sympathetic Cooling of Trapped Ions for Quantum Logic

January 1, 2000
Author(s)
D Kielpinski, B E. King, C J. Myatt, C A. Sackett, Q A. Turchette, Wayne M. Itano, C Monroe, David J. Wineland
… One limit to the fidelity of quantum logic operations on trapped ions arises from heating of the ions’ collective … Sympathetic Cooling of Trapped Ions for Quantum Logic …

Low Jitter Metal Vapor Vacuum Arc Ion Source for EBIT Injections

June 27, 2005
Author(s)
G Holland, Craig N. Boyer, J Seely, Joseph N. Tan, Joshua M. Pomeroy, John D. Gillaspy
… A metal vapor vacuum arc (MeVVA) ion source having eight different cathodes that are … vacuum head assembly. The over-damped pulse produces an ion flux of 8.4x109 ions/cm2, during a single discharge … Institute of Standards and Technology (NIST) Electron Beam Ion Trap (EBIT), are presented. …

Coupled quantized mechanical oscillators

March 10, 2011
Author(s)
Kenton R. Brown, Christian Ospelkaus, Yves Colombe, Andrew C. Wilson, Dietrich G. Leibfried, David J. Wineland
… between two motional modes of an individual trapped ion has been achieved by coupling through optical fields [6], … into hybrid quantum systems, such as coupling a trapped ion to a quantized macroscopic mechanical or electrical … interaction, coupled oscillators, harmonic oscillator, ion trap, mechanical oscillator, quantum oscillator, trapped …

Identifications of extreme ultraviolet spectra of Br-like to Ni-like neodymium ions using an electronbeam ion trap

April 30, 2021
Author(s)
C. Suzuki, Dipti Goyal, Y. Yang, A. Gall, Roshani Silwal, S. Sanders, Aung S. Naing, Joseph N. Tan, Endre A. Takacs, Yuri Ralchenko
… extreme ultraviolet spectra of open N-shell neodymium (Nd) ions have been recorded in an electron beam ion trap facility at the National Institute of Standards and … code. Consequently, 59 lines from Br-like to Ni-like Nd ions have been unambiguously identi ed, most of which are …

High-Stability Single-Ion Clock with 5.5 x 10^-19 Systematic Uncertainty

July 14, 2025
Author(s)
Mason Marshall, Daniel Rodriguez Castillo, Willa Dworschack, Alexander Aeppli, Kyungtae Kim, Dahyeon Lee, William Warfield, Nicholas Nardelli, Tara Fortier, Jun Ye, David Ray Leibrandt, David Hume
… We report a single-ion optical atomic clock with fractional frequency … based on quantum logic spectroscopy of a single 27Al+ ion. A co-trapped 25Mg+ ion provides sympathetic cooling and quantum logic readout of … High-Stability Single-Ion Clock with 5.5 x 10^-19 Systematic Uncertainty …

High-Temperature Guarded Hot Plate Apparatus Optimal Locations of Circular Heaters

June 1, 2005
Author(s)
Daniel R. Flynn, William M. Healy, Robert R. Zarr
… the use of circular line-heat-sources in guarded hot plate (GHP) apparatus, the most common type of absolute … apparatus used one circular line-heat-source in the meter plate and one in the guard plate. The later one-meter GHP apparatus used a single … 305-mm guarded hot plate, circular line-heat-source, guarded hot plate, …

Arrays of individually controlled ions suitable for two-dimensional quantum simulations

June 13, 2016
Author(s)
Manuel Mielenz, Henning Kalis, Matthias Wittemer, Frederick Hakelberg, Roman Blain, Peter Maunz, Dietrich Leibfried, Tobias Schaetz
… Here we characterise two-dimensional arrays of three ions trapped by radio-frequency fi elds in individually … state, as well as tuning of crucial couplings between ions within experimental sequences. Our work paves the way … analog quatum simulation, quantum control, trapped ions …
Displaying 151 - 175 of 4632
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