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Displaying 1101 - 1125 of 3757

Cryogenic Transfer Line Chilldown

June 1, 2004
Author(s)
N T. Van Dresar, James D. Siegwarth
… high flowrates, the maximum comsumption model overpredicts hydrogen consumption and underpredicts nitrogen consumption. … chilldown, cryogenic, liquid hydrogen, liquid nitrogen, transfer line …

Temperature-Controlled Depth Profiling in Poly(methylmethacrylate) (PMMA) Using Cluster Secondary Ion Mass Spectrometry (SIMS): I. Investigation of Depth Profile Characteristics

February 1, 2007
Author(s)
Christine M. Mahoney, Albert J. Fahey, John G. Gillen
… Secondary Ion Mass Spectrometry (SIMS) employing an SF5+ polyatomic primary ion source was used to depth profile Poly(methyl … rates, damage cross sections, and overall secondary ion stability) were monitored as a function of temperature. … in Poly(methylmethacrylate) (PMMA) Using Cluster Secondary Ion Mass Spectrometry (SIMS): I. Investigation of Depth …

The effect of Acetobacter sp. and a sulfate-reducing bacterial consortium from ethanol fuel environments on fatigue crack propagation in pipeline and storage tank steels

February 1, 2014
Author(s)
Jeffrey W. Sowards, Charles H. Williamson, Timothy S. Weeks, Joseph D. McColskey, John R. Spear
… sp., were responsible for acetic acid and hydrogen sulfide production that led to significant increases … The mechanism for increased fatigue damage is uptake of hydrogen that embrittles material ahead of the growing … biofuel, fatigue crack propagation, fuel grade ethanol, hydrogen sulfide, microbiologically influenced corrosion, …

EBIT Observation of Low Charge State Ar Dielectronic Recombination Features Near the Unknown Faint X-Ray Feature Found in the Stacked Spectrum of Galaxy Clusters

February 20, 2019
Author(s)
A. Gall, A. Foster, R. Silwal, Joan M. Dreiling, A. Borovik, E. Kilgore, M. Ajello, John Gillaspy, Yuri Ralchenko, Endre Takacs
… of galaxy clusters (Bulbul et al. 2014), an electron beam ion trap (EBIT) was used to investigate resonant dielectronic … with AtomDB data and numerous Ar DR features from multiple ion charge-states in the energy region near the unidentified …

Atom Probe Tomography Using an Extreme Ultraviolet Trigger Pulse

September 1, 2023
Author(s)
Benjamin Caplins, Ann Chiaramonti Debay, Jacob Garcia, Norman A. Sanford, Luis Miaja Avila
… most often uses an optical pulse to trigger field ion evaporation -- most commonly, the second or third … extreme ultraviolet (EUV) optical pulses to trigger field ion emission. The EUV light is generated via a commercially … the instrument's ability to successfully trigger field ion emission from semiconductor (Si, GaN) and insulating …

Helium Dispersion in an Attached Single-Car Residential Garage with and Without Vehicle

October 2, 2012
Author(s)
William M. Pitts, Jiann C. Yang, Marco G. Fernandez, Kuldeep R. Prasad
… the floor of the garage. Helium served as a surrogate for hydrogen for safety reasons, and helium release rates were … volume flow rate as that required to release 5 kg of hydrogen over a four hour period. Supporting measurements … below those corresponding to flammable concentrations of hydrogen, and the trapping of helium/air mixtures c …

Collision-Induced Dissociation of Deprotonated Peptides. Relative Abundance of Side-Chain Neutral Losses, Residue-Specific Product Ions, and Comparison with Protonated Peptides

November 14, 2017
Author(s)
Yuxue Liang, Pedatsur Neta, Xiaoyu (Sara) Yang, Stephen E. Stein
… High-accuracy MS/MS spectra of deprotonated ions of 390 dipeptides and 137 peptides with 3 to 6 residues … in deprotonated peptides produce specific negative ions after peptide bond cleavage. An expanded list of fragment ions from protonated peptides is also presented and compared …

Spin dephasing as a probe of mode temperature, motional state distributions, and heating rates in a two-dimensional ion crystal

March 9, 2014
Author(s)
Brian C. Sawyer, Joseph W. Britton, John J. Bollinger
… (COM) motional mode of a two-dimensional trapped ion crystal of hundreds of 9 Be + . By comparing the measured … insight into the size and nature of errors in trapped ion quantum gates produced by thermal fluctuations of a … measurement places an upper limit on the anomalous single-ion heating rate due to electric field noise from the trap …

A New Critical Review of Experimental Stark Widths and Shifts

April 1, 2001
Author(s)
N Konjevic, A Lesage, Jeffrey R. Fuhr, Wolfgang L. Wiese
We have undertaken, and almost completed, a new critical review of experimental data on Stark widths and shifts for spectral lines of non-hydrogenic neutral atoms and positive ions. This review covers the period from 1989 through the end of 1999 and

The Infrared Spectra of OCS + and OCS - Trapped in Solid Neon

July 1, 2001
Author(s)
C Lugez, Warren E. Thompson, Marilyn E. Jacox
When a Ne:OCS sample was codeposited at approximately 5 K with a beam of neon atoms that were excited in a microwave discharge, the infrared spectrum of the resulting deposit included absorptions which can be assigned to OCS +, OCS -, and one or more dimer

Asymptotic Properties of Self-Energy Coefficients

April 1, 2003
Author(s)
U Jentschura, E O. LeBigot, Peter J. Mohr, Paul Indelicato, G Soff
… to the one-loop self energy of excited states in atomic hydrogen. We evaluate the historically problematic A 60 …
Displaying 1101 - 1125 of 3757
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