Search results for: Petra Lagerkvist

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The application of radiochronometry during the 4th collaborative materials exercise of the nuclear forensics international technical working group (ITWG)

Michael J. Kristo, Ross Williams, Amy M. Gaffney, Theresa M. Kayzar-Boggs, more

Journal of Radioanalytical and Nuclear Chemistry > 2018 > 315 > 2 > 425-434

In a recent international exercise, 10 international nuclear forensics laboratories successfully performed radiochronometry on three low enriched uranium oxide samples, providing 12 analytical results using three different parent-daughter pairs serving as independent chronometers. The vast majority of the results were consistent with one another and consistent with the known processing history of...

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Overall approaches and experiences of first-time participants in the Nuclear Forensics International Technical Working Group’s Fourth Collaborative Material Exercise (CMX-4)

Doris M. L. Ho, Aubrey N. Nelwamondo, Ayako Okubo, Henrik Ramebäck, more

Journal of Radioanalytical and Nuclear Chemistry > 2018 > 315 > 2 > 353-363

The Fourth Collaborative Material Exercise (CMX-4) of the Nuclear Forensics International Technical Working Group (ITWG) registered the largest participation for this exercise in nuclear forensics, with seven of the 17 laboratories participating for the first time. Each of the laboratories had their strategic role to play in its respective country, analyzing real-world samples using their in-house...

article

Uranium assay and trace element analysis of the fourth collaborative material exercise samples by the modified Davies-Gray method and the ICP-MS/OES techniques

Aubrey N. Nelwamondo, Lisa P. Colletti, Rachel E. Lindvall, Anna Vesterlund, more

Journal of Radioanalytical and Nuclear Chemistry > 2018 > 315 > 2 > 379-394

An international group of laboratories participating in CMX-4 subjected three samples to comparative nuclear forensic analysis using uranium assay and trace element analysis techniques to determine if the samples had similar or different origins. Uranium assay indicated that two pellet samples (ES-2 and ES-3) were nearly pure UO₂ while the black powder sample ES-1 was primarily UO₂ with UO₃ and/or...

article

On the application of ICP-MS techniques for measuring uranium and plutonium: a Nordic inter-laboratory comparison exercise

Jixin Qiao, Petra Lagerkvist, Ilia Rodushkin, Susanna Salminen-Paatero, more

Journal of Radioanalytical and Nuclear Chemistry > 2018 > 315 > 3 > 565-580

Inductively coupled plasma mass spectrometry (ICP-MS) techniques are widely used for determination of long-lived radionuclides and their isotopic ratios in the nuclear fields. Uranium (U) and Plutonium (Pu) isotopes have been determined by many researchers with ICP-MS due to its relatively high sensitivity and short measurement time. In this work, an inter-laboratory comparison exercise among the...

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Erratum to: Inter-laboratory exercise with an aim to compare methods for ⁹⁰Sr and ^239,240Pu determination in environmental soil samples

Jixin Qiao, Susanna Salminen-Paatero, Stina Holmgren Rondahl, Marie Bourgeaux-Goget, more

Journal of Radioanalytical and Nuclear Chemistry > 2017 > 314 > 2 > 827-827

In the original article, the LOD assigned to method Sr-B in Table 1 was published incorrectly as 24 Bq/kg, the correct LOD for that method should be 10.4 Bq/kg. As a consequence the range of LODs, as presented in the first sentence of the section Limit of detection should be stated as “It can be seen from Table 1 that, the LODs of ⁹⁰Sr vary from 0.2 to 10.4 Bq/kg among the four methods used in this...

article

Crystal structure of radium sulfate: An X-ray powder diffraction and density functional theory study

Artem V. Matyskin, Rikard Ylmen, Petra Lagerkvist, Henrik Ramebäck, more

Journal of Solid State Chemistry > 2017 > 253 > C > 15-20

Radium-barium sulfate (Ra_0.76Ba_0.24SO₄) powder was examined using X-ray Diffraction (XRD) technique and its crystal structure was optimized using Density Functional Theory (DFT). XRD data show that radium and barium sulfate form a solid solution and that Ra_0.76Ba_0.24SO₄ is orthorhombic and isostructural with pure RaSO₄, barite (BaSO₄), celestite (SrSO₄) and anglesite (PbSO₄), crystallizing in the...

article

Inter-laboratory exercise with an aim to compare methods for ⁹⁰Sr and ^239,240Pu determination in environmental soil samples

Jixin Qiao, Susanna Salminen-Paatero, Stina Holmgren Rondahl, Marie Bourgeaux-Goget, more

Journal of Radioanalytical and Nuclear Chemistry > 2017 > 314 > 2 > 813-826

In order to deliver reliable results for a multitude of different scenarios, e.g. emergency preparedness, environmental monitoring, nuclear decommissioning and waste management, there is a constant process of method development in the field of radioanalytical chemistry. This work presents the results of a method comparison exercise aimed at quantifying ⁹⁰Sr and ^239,240Pu in environmental soil samples,...

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Recrystallization of ²²³Ra with barium sulfate

Natallia Torapava, Henrik Ramebäck, Enzo Curti, Petra Lagerkvist, more

Journal of Radioanalytical and Nuclear Chemistry > 2014 > 301 > 2 > 545-553

In this work, the kinetics of barium sulfate recrystallization has been studied in acidic 0.01 mol dm⁻³ sodium sulfate solution using ²²³Ra and ¹³³Ba tracers at very low total radium concentration, i.e. less than 10⁻¹³ mol dm⁻³. It was found that the system follows the homogeneous recrystallization model and that recrystallization rates, inferred by the decrease of ²²³Ra and ¹³³Ba in the aqueous solution,...

article

Implementing combined uncertainty according to GUM into a commercial gamma spectrometric software

Henrik Ramebäck, Annika Tovedal, Ulrika Nygren, Petra Lagerkvist, more

Journal of Radioanalytical and Nuclear Chemistry > 2009 > 282 > 3 > 979-983

Measurement uncertainty is an important part of a measurement result that still often is neglected. A complete combined uncertainty budget can be calculated for non-routine measurements. However, for routine measurements, this work becomes time-consuming since every measurement result requires an uncertainty analysis. By analysing the uncertainty on a measurement system level in e.g. high resolution...

article

Methodology for determination of ⁸⁹Sr and ⁹⁰Sr in radiological emergency: II. Method development and evaluation

Annika Tovedal, Ulrika Nygren, Petra Lagerkvist, Anna Vesterlund, more

Journal of Radioanalytical and Nuclear Chemistry > 2009 > 282 > 2 > 461-466

In this work a method for the determination of both ⁸⁹Sr and ⁹⁰Sr is presented. The method can potentially be used in radiological emergency and deliver results shortly after an incident. The method development was based on theoretical calculations of potential interferences from other fission products and how these could be discriminated when applying different chemical separation schemes. Validation...

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Keywords

NUCLEAR FORENSICS (3)
GAMMA SPECTROMETRY (2)
ICP-MS (2)
PU (2)
89SR (1)
90SR (1)
90Y (1)
ALKALINE-EARTH METALS (1)
ALPHA SPECTROMETRY (1)
BARITE (1)
CMX-4 NEW PARTICIPANTS (1)
CO-PRECIPITATION (1)
COMBINED UNCERTAINTY (1)
COMMERCIAL SOFTWARE (1)
DAVIES-GRAY (1)
IAEA-384 (1)
IMPURITIES (1)
INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY (1)
INTERFERING NUCLIDES (1)
KINETICS (1)
METHOD COMPARISON (1)
NBL CRM-103A (1)
NOVEL APPROACHES (1)
NUCLEAR WASTE (1)
RADIOANALYTICAL PROCEDURES (1)
RADIOCHEMICAL ANALYSIS (1)
RADIOCHRONOMETRY (1)
RADIOLOGICAL EMERGENCY (1)
RADIUM (1)
RADIUM SULFATE (1)
RASO4 (1)
REACTOR COOLANT WATER (1)
RECRYSTALLIZATION (1)
SOIL (1)
SR (1)
THERMAL IONIZATION MASS SPECTROMETRY (1)
TRACE ELEMENT ANALYSIS (1)
U (1)
UNCERTAINTY BUDGET (1)
URANIUM ASSAY (1)
URANIUM OXIDE (1)
X-RAY DIFFRACTION (1)
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Springer (9)
Elsevier (1)

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Search results for: Petra Lagerkvist

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