Journal ArticleDOI
On the calculation of activity concentrations and nuclide ratios from measurements of atmospheric radioactivity.
A. Axelsson,A. Ringbom +1 more
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TLDR
It is noted that statistical uncertainties for nuclide ratios can be properly calculated using the exact solution to the problem of confidence intervals for a ratio of two jointly normally distributed variables, the so-called Fieller׳s theorem.About:
This article is published in Applied Radiation and Isotopes.The article was published on 2014-09-01. It has received 18 citations till now. The article focuses on the topics: Nuclide & Decay correct.read more
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A review of the developments of radioxenon detectors for nuclear explosion monitoring
TL;DR: In this paper, a review of radioxenon monitoring with emphasis on the most current technologies to improve detector sensitivity and resolution is presented. And the minimum detectable activity and calibration methods for the various detectors are also discussed.
Journal ArticleDOI
Fundamental uncertainty equations for nuclear dating applied to the 140Ba-140La and 227Th-223Ra chronometers.
TL;DR: Basic equations for age dating through activity ratio measurements are presented and applied to nuclear chronometers based on parent-daughter decay and Mathematical solutions are presented to correct the perceived activity ratio and adapt the uncertainty propagation formulae to complete the uncertainty budget.
Journal ArticleDOI
Comparison of new and existing algorithms for the analysis of 2D radioxenon beta gamma spectra
TL;DR: The aims of this paper are to compare radioxenon beta–gamma analysis algorithms using simulated spectra with experimentally measured background, and to generate an estimate for the minimum detectable counts for each isotope using each algorithm.
Journal ArticleDOI
A program to generate simulated radioxenon beta–gamma data for concentration verification and validation and training exercises
Justin I. McIntyre,Brian T. Schrom,Matthew W. Cooper,Amanda M. Prinke,Thomas J. Suckow,A. Ringbom,Glen A. Warren +6 more
TL;DR: PNNL developed a beta–gamma simulator (BGSim) that incorporated GEANT-modeled data sets from radioxenon decay chains, as well as functionality to use nuclear detector-acquired data sets to create new beta-gamma spectra with varying amounts of background.
Journal ArticleDOI
A high-resolution β−γ coincidence spectrometry system for radioxenon measurements
Matthew A. Goodwin,R. Britton,A.V. Davies,Steven Bell,S.M. Collins,S.M. Collins,P. H. Regan,P. H. Regan +7 more
TL;DR: The PIPSBox as mentioned in this paper was configured to measure the signals from the four radionuclides of interest and demonstrates improved discrimination between signals and less interference compared to the current system.
References
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Journal ArticleDOI
Some problems in interval estimation
TL;DR: In this article, the fiducial distributions of a simple equation (i.e., a ratio), and the roots of a quadratic equation with variable coefficients with respect to the region of the (aC, t2) plane lying above the curve are investigated.
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SAUNA—a system for automatic sampling, processing, and analysis of radioactive xenon
TL;DR: In this article, a system for automatic sampling, processing, and analysis of atmospheric radioxenon has been developed, which is performed using activated charcoal and molecular sieves at ambient temperature.
Journal ArticleDOI
Atmospheric xenon radioactive isotope monitoring
TL;DR: On the basis of the continuous 24-h resolution record of the atmospheric xenon radioactive isotopes concentrations, the SPALAX system demonstrated that ambient levels of 133Xe can fluctuate quickly from less than the detection limit to over 40 x 10(-3) Bq m(-3).
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Discrimination of Nuclear Explosions against Civilian Sources Based on Atmospheric Xenon Isotopic Activity Ratios
Martin Kalinowski,Anders Axelsson,Marc Bean,X. Blanchard,T.W. Bowyer,G. Brachet,Simon Hebel,Justin I. McIntyre,Jana Peters,Christoph Pistner,Maria Raith,A. Ringbom,Paul R. J. Saey,Clemens Schlosser,T. J. Stocki,T. Taffary,R. Kurt Ungar +16 more
TL;DR: A global monitoring system for atmospheric xenon radioactivity is being established as part of the International Monitoring System that will verify compliance with the Comprehensive Nuclear-Test-Ban Treaty (CTBT) once the treaty has entered into force as discussed by the authors.
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Radioxenon detections in the CTBT international monitoring system likely related to the announced nuclear test in North Korea on February 12, 2013.
A. Ringbom,A. Axelsson,M. Aldener,M. Auer,T.W. Bowyer,T. Fritioff,Ian Hoffman,K. Khrustalev,Mika Nikkinen,V. Popov,Yu. S. Popov,Kurt Ungar,Gerhard Wotawa +12 more
TL;DR: Comparison of measured data with calculated isotopic ratios as well as analysis using atmospheric transport modeling indicate that it is likely that the xenon measured was created in the underground nuclear test conducted by North Korea on February 12, 2013, and released 7-8 weeks later.