On the calculation of activity concentrations and nuclide ratios from measurements of atmospheric radioactivity

Axelsson, A.; Ringbom, Anders

doi:10.1016/j.apradiso.2014.05.020

Cited by 20 publications

(1 citation statement)

References 14 publications

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“…The prevailing nuclear measurement technique for radioxenon uses a coincidence measurement of the beta-gamma signature from the isotopic decay to identify the isotope and activity. The concentration and activity are calculated using the net-count method [6,10,11]. The primary sources of interfering backgrounds in the measurement are the radon daughters 214 Pb and 214 Bi, which decay via β − decay.…”

Section: Introductionmentioning

confidence: 99%

Method for calculating radon activity and radon rejection using a beta-gamma detector

Mayer

Cooper

Ely

et al. 2022

J Radioanal Nucl Chem

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Radon interferes with concentration measurements used by atmospheric radioxenon systems. We demonstrate a method to quantify the amount of radon that is present in the detectors, the impact of radon activity on the minimum-detectable-concentrations, and how to determine the needed radon rejection levels. An example calculation shows a radon rejection level of 105 is sufficient to limit impact on the detector sensitivity. We anticipate this method will give analysist a better understanding of radon present in their measurements and allow system designers to tailor their systems’ radon rejection better for its location.

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Section: Introductionmentioning

confidence: 99%

Method for calculating radon activity and radon rejection using a beta-gamma detector

Mayer

Cooper

Ely

et al. 2022

J Radioanal Nucl Chem

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A Consideration of Radioxenon Detections Around the Korean Peninsula

Goodwin

Britton

Davies

2020

Pure Appl. Geophys.

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Characterization of CTBT-Relevant Radioxenon Detections at IMS Stations Using Isotopic Activity Ratio Analysis

Boxue¹,

Kalinowski²,

Sun

et al. 2023

Pure Appl. Geophys.

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Radioxenon isotopes measured at radionuclide stations of the Comprehensive Nuclear-Test-Ban Treaty’s (CTBT) International Monitoring System (IMS) may indicate releases from underground nuclear explosions (UNEs) but are often caused by emissions from nuclear facilities. Characterization of CTBT-relevant nuclear events may use the evolution of isotopic activity ratios over time, which goes from the release of an assumed UNE, through atmospheric transport, to sample collections and measurements. A mathematical approach is presented to discuss the characterization of the spatial and temporal relationships between a nuclear explosion and radioxenon measurements. On the one hand, activity concentrations at an IMS station are estimated by using the assumed release scenario regarding a UNE and atmospheric transport modelling. On the other hand, the activities collected in the samples are determined by spectral analysis first and the activity concentrations in the air passing over the IMS station are estimated under an assumption of constant concentration during sampling. The isotopic ratios of activities released from the UNE are related to the isotopic ratios of activity concentrations in the plume of air crossing the IMS station, resulting in a function of the isotopic activity ratio over the time from detonation to sample measurement. The latter is used for discrimination of a nuclear test and estimation of the time of detonation, such as a four radioxenon plot of the activity ratio relationship of 135Xe/133Xe versus 133mXe/131mXe.

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On the calculation of activity concentrations and nuclide ratios from measurements of atmospheric radioactivity

Cited by 20 publications

References 14 publications

Method for calculating radon activity and radon rejection using a beta-gamma detector

Method for calculating radon activity and radon rejection using a beta-gamma detector

A Consideration of Radioxenon Detections Around the Korean Peninsula

Characterization of CTBT-Relevant Radioxenon Detections at IMS Stations Using Isotopic Activity Ratio Analysis

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