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Displaying 1676 - 1700 of 2769

Suspect Screening of Per- and Polyfluoroalkyl Substances in New Firefighter Turnout Gear Textiles

March 20, 2025
Author(s)
Andrew Maizel, Andre Thompson, Benjamin Place, Alix Rodowa, Jessica Reiner, Audrey Tombaugh, Halen Solomon, Brittany Stinger, Michelle Donnelly, Rick Davis
… annotations are evaluated by comparison of precursor ion spectra against predicted isotopic distributions while … annotations are evaluated by comparison of product ion spectra against previously collected spectra using the …

Speciating volatile organic compounds in indoor air: using in-situ GC to interpret real-time PTR-MS signals

December 18, 2024
Author(s)
Jenna Ditto, Han Huynh, Jie Yu, Michael Link, Dustin Poppendieck, Megan Claflin, Marina Vance, Delphine Farmer, Arthur Chan, Jonathan Abbatt
… so it can be challenging to differentiate between an ion of interest, its isomers, and fragmentation products from … Air (CASA) study. Observed interferences at each extracted ion chromatogram ranged from 0 % (C2H6OH+, C8H24O4Si4H+, and …

Effects of Detector Dead-time on Quantitative Analyses Involving Boron and Multi-Hit Detection Events in Atom Probe Tomography

July 29, 2015
Author(s)
Frederick Meisenkothen, Eric B. Steel, T. J. Prosa, Karen T. Henry, Ratna P. Kolli
… approach to resolve same isotope, same charge-state ion pair (e.g. 11B1+/11B1+) information in multi-hit … is 2 at work in atom probe measurements of B in Si. Ion correlation analysis was used to graphically demonstrate … dead-time results in few same isotope, same charge-state ion pairs being properly recorded in the multi-hit data, …

Recent progress in spectroscopy of tungsten

May 20, 2011
Author(s)
Alexander Kramida
… Most of the measurements were made using electron-beam ion traps (EBITs). Two laser-spectroscopy studies resulted in … some light on the complex electronic structure of this ion and identifies some experimentally observed transitions. …

Matrix Clusters and Polymer-Matrix Adducts in the MALDI Analysis of Polystyrene

January 1, 2000
Author(s)
R J. Goldschmidt, Charles M. Guttman
The formation of matrix cluster ions and of polymer-matrix adduct ions in the matrix-assisted laser desorption/ionization (MALDI) analysis of polystyrene was investigated using layered sample preparations. It has been shown by post-source decay (PSD)

Anomalous Asymmetric Intermixing in Pt/Ti

October 12, 2021
Author(s)
P Sule, M. Menyhard, L Kotis, J Labar, William F. Egelhoff Jr.
… The ion-sputtering induced intermixing is studied by Monte-Carlo … features of intermixing using TRIM and MD simulations for ion-beam sputtering and get reasonablevalues for interface …

Magnetic Ordering in the Ising Antiferromagnetic Pyrochlore Nd 2 ScNbO 7

May 14, 2021
Author(s)
C. Mauws, N. Hiebert, M. Rutherford, H. D. Zhou, Q. Huang, M. B. Stone, Nicholas Butch, Y. Su, E. S. Choi, Z. Yamani, C. R. Wiebe
The question of structural disorder and its effects on magnetism is relevant to a number of spin liquid candidate materials. Although commonly thought of as a route to spin glass behavior, here we describe a system in which the structural disorder destroys

Targeted enrichment of 28Si thin films for quantum computing

March 9, 2020
Author(s)
Ke Tang, Hyun S. Kim, Aruna N. Ramanayaka, David S. Simons, Joshua M. Pomeroy
… computing remain unknown. Here we use hyperthermal energy ion beam deposition with silane gas to deposit epitaxial … parameters and measure the deposited film using secondary ion mass spectrometry (SIMS). The measured 29Si …

Enriching 28Si beyond 99.9998 % for semiconductor quantum computing

August 5, 2014
Author(s)
Kevin J. Dwyer, Joshua M. Pomeroy, David S. Simons, June W. Lau, Kristen L. Steffens
Using a laboratory-scale apparatus, we enrich 28Si and produce material with 40 times less residual 29Si than previously reported. Starting from natural abundance silane gas, we offer an alternative to industrial gas centrifuges for providing materials

99.996% 12C films enriched and deposited in situ

June 28, 2013
Author(s)
Kevin J. Dwyer, Joshua M. Pomeroy, David S. Simons
… A mass selected ion beam system is used to isotopically enrich and deposit … of the deposited films is assessed ex situ using Secondary Ion Mass Spectrometry. …
Displaying 1676 - 1700 of 2769
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