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Search Publications by: Jacqueline L. Mann (Fed)

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Displaying 1 - 20 of 20

Assessing the Microscale Heterogeneity in Candidate Standard Reference Material 4600: Surrogate Post-detonation Urban Debris

August 18, 2021
Jacqueline L. Mann, John L. Molloy, Mark Tyra, Kevin Pfeuffer, Barbara Fallon, JoAnn Buscaglia
Nondestructive microbeam X-ray fluorescence (µXRF) spectrometry has been used to investigate the elemental microheterogeneity in a candidate nuclear forensics reference material (RM), NIST SRM 4600: Surrogate Post-detonation Urban Debris. Using a principal

New determination of the 229Th half-life

July 23, 2018
Richard Essex, Jacqueline L. Mann, Ronald Colle, Lizbeth Laureano-Perez, Megan E. Bennett, Heather Dion, Ryan P. Fitzgerald, Amy M. Gaffney, Amelie Hubert, Robert E. Steiner, Ross W. Williams, Alkiviadis Gourgiotis, William S. Kinman
A new determination of the 229Th half-life was made based on measurements of the 229Th massic activity of a high-purity solution for which the 229Th molality had previously been measured. The 229Th massic activity was measured by direct comparison with SRM

New thorium-229 standard reference material

July 27, 2017
Richard Essex, Jacqueline L. Mann, Ross W. Williams, William S. Kinman, Amelie Hubert, Megan E. Bennett
A new reference material, preliminarily designated as SRM 3059, was characterized for 229Th molality (mol•g-1) and thorium isotope amount ratios. This SRM is intended for use in nuclear forensic analyses as an isotope dilution mass spectrometry spike. The

Determination of Low-Level Sulfur Concentrations by Isotope Dilution Multi-Collector Inductively Couple Plasma Mass Spectrometry (D-MC-ICPMS) Using 33S Spike and Internal Normalization for Mass Bias Correction

February 28, 2012
Jacqueline L. Mann, Robert D. Vocke Jr., William R. Kelly
An isotope dilution (ID) multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) method combined with an internal normalization approach for mass bias correction has been used to determine low-level sulfur (S) concentrations in a

Elemental Analysis of a Single-Walled Carbon Nanotube Candidate Reference Material

October 15, 2010
Rolf L. Zeisler, Rick L. Paul, Rabia Oflaz, Lee L. Yu, Jacqueline L. Mann, William R. Kelly, Brian E. Lang, Stefan D. Leigh, Jeffrey A. Fagan
A material containing single-walled carbon nanotubes (SWCNTs) together with other carbon species, cata-lyst residues, and trace element contaminants has been prepared by the National Institute of Standards and Technology for characterization and

Final Report: Key Comparison CCQM Pilot Ka35: Determination of Sulfur in Diesel Fuel

April 2, 2007
William R. Kelly, Robert D. Vocke Jr., Jacqueline L. Mann, Gregory C. Turk
The CCQM-K35 Key Comparison was organized by the Inorganic Analysis Working Group (IAWG) of the CCQM to test the capabilities of National Metrological Institutes (NMI s) to measure the sulfur content of diesel fuel at the 40 g/g level. Four NMI s

Final Report: Report of the CCQM Pilot P26.1: Determination of Sulfur in Diesel Fuel

January 1, 2007
William R. Kelly, Robert D. Vocke Jr., Jacqueline L. Mann, Gregory C. Turk
The European Union and the United States have set new lower limits on sulfur in diesel transport fuel of 10 g/g and 15 g/g, respectively. Implementation of these regulations will require the production of high accuracy standards at these and lower levels