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Displaying 826 - 850 of 3841

Depth Profiling Using C 60 + SIMS Deposition and Topography Development During Bombardment of Silicon

July 30, 2006
Author(s)
John G. Gillen, J Batteas, Chris A. Michaels, P Chi, John A. Small, Eric S. Windsor, Albert J. Fahey, Jennifer R. Verkouteren, W Kim
… A C60+ primary ion source has been coupled to an ion microscope SIMS instrument to examine sputtering of … also observed on silicon substrates after high primary ion dose C60+ bombardment. … cluster bombardment, depth profiling, fullerene, ion source, secondary ion mass spectrometry …

Characterization of Compositional Heterogeneity in Chemically Amplified Photoresist Polymer Thin Films with Infrared Spectroscopy

February 9, 2007
Author(s)
Shuhui Kang, B D. Vogt, Vivek Prabhu, Eric K. Lin, Wen-Li Wu, David L. VanderHart, Ashwin Rao, Karen Turnquest
… these domains, the carboxylic acid groups dimerize through hydrogen bonding. FTIR measurements of the relative fraction of hydrogen-bonded vs free carboxylic groups are used to … follow the expected linear dependence of the relative hydrogen-bonded fraction with composition. For the chemically …

Measurement of the Kr XVIII 3d 2D5/2 lifetime in a Unitary Penning Trap

April 24, 2014
Author(s)
Nicholas D. Guise, Joseph Tan, Samuel Brewer, Charlotte F. Fischer, P. Jonsson
… trapping volume. Kr17+ ions produced in an electron beam ion trap (EBIT) are extracted and captured in this unitary … that is about a factor of 102 lower than in the EBIT ion source. The 637 nm photons emitted by the captured Kr … Ion trapping, Atomic spectroscopy, Atomic Physics …

Energies and E1, M1, E2, and M2 transition rates for states of the 2s22p4, 2s2p5, and 2p6configurations in oxygen-like ions between F II and Kr XXIX.

September 24, 2013
Author(s)
P. Rynkun, P. Jonsson, G. Gaigalas, Charlotte F. Fischer
… 2s2p5, and 2p6 configurations in all oxygen-like ions between F II and Kr XXIX. Valence, core-valence, and … O-like ions, energies, lifetimes, transition rates, weighted … of the 2s22p4, 2s2p5, and 2p6configurations in oxygen-like ions between F II and Kr XXIX. …

Fragmentation of Leucine Enkephalin as a Function of Laser Fluence in a MALDI TOF-TOF

April 2, 2007
Author(s)
Jennifer M. Campbell, Stephen Stein, Paul S. Blank, Jonathan Epstein, Marvin L. Vestal, Alfred L. Yergey
… The effects of laser fluence on ion formation in MALDI was studied using a tandem TOF mass … followed over laser fluence ranging from the threshold of ion formation to the maximum available, i.e., approximately … data suggest the presence of two distinct environments for ion formation. One is associated with molecular desorption at …

Characterizing the ZrBe 2 H x Phase Diagram via Neutron Scattering Methods

January 1, 2023
Author(s)
Hui Wu, Wei Zhou, Terrence J. Udovic, Jr. Bowman, Bjorn C. Hauback
… with hexagonal P6/mmm symmetry that undergoes some type of hydrogen sublattice ordering below 200 K (235-250 K for ZrBe … spectroscopy measurements of ZrBe d2^H x at lower hydrogen contents (x … ZrBe2, intermetallic hydrides, hydrogen storage materials, neutron diffraction, neutron …

Heavy ion space radiation triggers ongoing DNA base damage by downregulating DNA repair pathways

July 7, 2020
Author(s)
Shubhankar Suman, Pawel Jaruga, M Miral Dizdar, Albert J. Fornace, Jr., Datta Kamal
… particle radiation especially to highly damaging heavy ion radiation, which poses considerable risk to astronauts' … diseases including gastrointestinal diseases after heavy ion radiation exposure during space travel. … Heavy ion space radiation, DNA damage and repair, oxidative stress, …

Density Functional Theory Meta GGA Study of Water Adsorption in MIL-53(Cr)

July 16, 2019
Author(s)
Eric J. Cockayne
… zero- temperature np and lp configurations each have a hydrogen bond between the H of each framework hydroxyl group … are observed. A concentration x = 1.25 leads to hydrogen bonding between water molecules in the np phase that … MIL-53(Cr), MOF, hydrogen bonding, DFT, water adsorption …

Comparison of Numerical Approaches to the Time-Dependent Schrodinger Solutions in One Dimension

June 26, 2019
Author(s)
Heman Gharibnejad, Barry I. Schneider, Mark Leadingham, henry Schmale
… propagation schemes using a one-dimensional model of the hydrogen atom. In this model, the exact coulomb potential is … of what occurs in the fully three dimensional hydrogen atom. Our results show that while many numerically … Time Dependent Schrodinger Equation, one-dimensional hydrogen, numerical methods …

Architecture for a Large-Scale Ion-Trap Quantum Computer

January 1, 2002
Author(s)
D Kielpinski, C R. Monroe, David J. Wineland
… being explored for quantum computers are systems utilizing ion traps, in which quantum bits (qubits) are formed from the … on using quantum communication to link a number of small ion- trap quantum systems. Developing the array-based … subspaces significantly reduces decoherence during ion transport, and removes the requirement of clock …

Comparison of Mg-based liquid metal ion sources for scalable focused-ion-implantation doping of GaN

April 18, 2024
Author(s)
Aaron Katzenmeyer, Michael Titze, Sam Frisone, Tony Ohlhausen, Anthony Flores, Deanna Campbell, Bingjun Li, Yongqiang Wang, Jung Han, Edward Bielejec, Rachel Goldman
… suitability of various magnesium-based liquid metal alloy ion sources (LMAIS) for scalable focused-ion-beam (FIB) implantation doping of GaN. We consider GaMg, … Mg depth profile data from Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS). We also provide insight …

Multi-configuration Dirac-Hartree-Fock calculations of forbidden transitions within the 3d^k ground configurations of highly charged ions (Z = 72 - 83)

February 21, 2017
Author(s)
Z.L. Zhao, K. Wang, S. Li, R. Si, C.Y. Chen, J. Yan, Yuri Ralchenko
… 3p^6 3d^k(k = 1−9) ground configurations of highly charged ions (Z = 72−83). Complete and consistent data sets of level … Dirac-Hartree-Fock calculations, highly charged ions, magnetic dipole transitions, electric quadrupole … within the 3d^k ground configurations of highly charged ions (Z = 72 - 83) …

Resonant Soft X-Ray Photofragmentation of Propane

July 1, 2003
Author(s)
William E. Wallace, Daniel A. Fischer
… ions between 38 u and 40 u created by the loss of hydrogen while the electron-impact ionization is dominated by a major peak at 29 u corresponding to the two-carbon ion C 2 H 5 + . Within each envelope of three-, two-, or … spectrum showed a bias toward enhanced multiple hydrogen removal compared to the electron-stimulated spectrum. …

Effect of Hydrogen Concentration on Neutron Moderation of Hydrides at 900 K

September 5, 2025
Author(s)
Moiz Butt, Abdullah Weiss, Erik Pavlina, Thomas Nizolek, Michael Hahn, Caitlin Kohnert, Sean McDeavit, Erik Luther
… Yttrium, Zirconium, Hydride, Hydrogen, Moderation, Shielding, Attenuation, Permeation, … Effect of Hydrogen Concentration on Neutron Moderation of Hydrides at …

Simultaneous neutron and X-ray tomography for ex-situ 3D visualization of graphite anode degradation from extremely fast-charged lithium-ion batteries

November 16, 2022
Author(s)
Maha Yusuf, Jacob LaManna, Partha Paul, David Agyeman-Budu, Chuntian Cao, Alison Dunlop, Andrew Jansen, Bryant Polzin, Stephen Trask, Tanvir Tanim, Eric Dufek, Vivek Thampy, Hans-Georg Steinruck, Michael Toney, Johanna Weker
… Extreme fast charging (XFC) of commercial lithium-ion batteries (LIBs) in ≤10-15 minutes will significantly … X-ray imaging, tomography, extreme-fast charging, lithium-ion batteries … anode degradation from extremely fast-charged lithium-ion batteries …

Bevel Depth Profiling SIMS for Analysis of Layer Structures

September 1, 2003
Author(s)
John G. Gillen, Scott A. Wight, P Chi, Albert J. Fahey, Jennifer R. Verkouteren, Eric S. Windsor, D. B. Fenner
… are evaluating the use of bevel depth profiling Secondary Ion Mass Spectrometry (SIMS) for the characterization of … the analytical sample with an oxygen or cesium primary ion beam in a commercial SIMS instrument. The elemental … the resulting bevel surface is then imaged with a focused ion beam in the same instrument. This approach offers maximum …

Quantum Electrodynamics in the Dark

August 1, 2001
Author(s)
John D. Gillaspy
… dielectronic recombination, highly charged ions, ion traps, QED, quantum electrodynamics, strong electric …
Displaying 826 - 850 of 3841
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