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You searched on: Topic Area: Nuclear Analytical Chemistry

Displaying records 1 to 10 of 33 records.
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1. Reevaluation of Neutron Flux Characterization Parameters for NIST RT-2 Facility
Topic: Nuclear Analytical Chemistry
Published: 12/31/2014
Authors: Dagistan Sahin, Vladimir Radulovic, Richard Mark Lindstrom, Andrej Trkov
Abstract: It has been difficult to characterize the thermal to epithermal neutron flux ratio (f) and the measure of the nonideal epithermal neutron flux distribution (α) for the RT-2 pneumatic rabbit facility at the NIST National Bureau of Standards React ...

2. Determination of Arsenic in Food and Dietary Supplement Standard Reference Materials by Neutron Activation Analysis
Topic: Nuclear Analytical Chemistry
Published: 9/1/2013
Author: Rick L Paul
Abstract: Arsenic has been measured in food and food supplement Standard Reference Materials by neutron activation analysis for the purpose of value-assigning As mass fractions and assessing homogeneity. Instrumental neutron activation analysis (INAA) has been ...

3. An imaging spectrometer based on high resolution microscopy of fluorescent aluminum oxide
Topic: Nuclear Analytical Chemistry
Published: 1/14/2013
Authors: James A. Bartz, Cynthia J Zeissler, V. V. Fomenko, Mark S. Akselrod
Abstract: Fluorescent Nuclear Track Detector (FNTD) technology was tested as an imaging and spectroscopic tool for radionuclide analysis. This investigation intended to distinguish between characteristic α-particles of 239Pu (5.2 MeV), 234U (4.8 MeV) and ...

4. Radio-microanalytical particle measurements method and application to Fukushima aerosols collected in Japan
Topic: Nuclear Analytical Chemistry
Published: 8/26/2012
Authors: Cynthia J Zeissler, Lawrence Forsley, Richard Mark Lindstrom, Sean Newsome, Adrean Kirk, P.A. Mosier-Boss
Abstract: A nondestructive analytical method based on autoradiography and gamma spectrometry was developed to perform activity distribution analysis for particulate samples. This was applied to aerosols collected in Fukushima Japan, 40 km north of the Daiich ...

5. Cold Neutron Activation Analysis, a Nondestructive Technique for Hydrogen Level Assessment in Zirconium Alloys
Topic: Nuclear Analytical Chemistry
Published: 6/1/2012
Authors: Rick L Paul, Adrien Couet, Arthur Motta, Robert Comstock
Abstract: We propose a novel use of a non-destructive technique to quantitatively assess hydrogen concentration in zirconium alloys. The technique, called Cold Neutron Prompt Gamma Activation Analysis (CNPGAA), is based on measuring prompt gamma rays following ...

6. Use of Neutron Activation Analysis for the Characterization of Single-Wall Carbon Nanotube Materials
Topic: Nuclear Analytical Chemistry
Published: 6/9/2011
Authors: Rolf Louis Zeisler, Rabia Oflaz, Rick L Paul, Jeffrey A Fagan
Abstract: Instrumental neutron activation analysis (INAA) and prompt gamma neutron activation analysis (PGAA) were used to characterize a variety of single-wall carbon nanotube (SWCNT) materials from different principal production processes, as well as a mater ...

7. Determination of Elements in SRM Soil 2709a by Neutron Activation Analysis
Topic: Nuclear Analytical Chemistry
Published: 12/1/2009
Authors: Rick L Paul, Elizabeth A Mackey, Rolf Louis Zeisler, Rabia Oflaz, Bryan E. Tomlin
Abstract: A combination of instrumental neutron activation analysis (INAA) and prompt gamma-ray activation analysis (PGAA) was used to value assign 35 elements in SRM soil 2709a (San Joaquin Soil). INAA with counting of short-lived radioisotopes was used for ...

8. Neutron Activation Analysis with Pe- and Post-Irradiation Chemical Separation for the Value Assignments of AL, V, and Ni in the New Bovine Liver SRM 1577C
Topic: Nuclear Analytical Chemistry
Published: 10/22/2009
Authors: Rolf Louis Zeisler, Bryan E. Tomlin, Karen E Murphy
Abstract: Instrumental neutron activation analysis (INAA) as carried out at the National Institute of Standards and Technology (NIST) is inadequate for de-termining Al, Ni, and V at the levels found in the newly prepared Standard Reference Material (SR ...

9. A New Evaluation of the Half-life of 241Pu
Topic: Nuclear Analytical Chemistry
Published: 4/14/2009
Authors: Roger Wellum, Andre Verbruggen, Ruediger Kessel
Abstract: A new evaluation of the half-life of 241Pu has been made by developing earlier methods and techniques and employing further measurements of the isotopic ratio of an initially enriched 241Pu material. A correction to the previous value has had to be m ...

10. International NMR-based Environmental Metabolomics Intercomparison Exercise
Topic: Nuclear Analytical Chemistry
Published: 4/7/2009
Authors: Daniel W Bearden, Mark Viant, Jacob Bundy, Ian Burton, Tim Collette, Drew Ekman, Tobias Karakach, Ching Yu Lin, Simone Rochfort, Jeff de Ropp, Quincy Teng, Ron Tjeerdema, John Walter, Huifeng Wu
Abstract: Several fundamental requirements must be met so that NMR-based metabolomics can be formally adopted into environmental monitoring and chemical risk assessment. Here we report an intercomparison exercise which has evaluated the accuracy, precision a ...

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