Memory effect, resolution, and efficiency measurements of an Al2O3 coated plastic scintillator used for radioxenon detection

Blackberg, Lisa; Fritioff, T.; Mårtensson, L.; Nielsen, F.; Ringbom, Anders; Sjöstrand, Henrik; Klintenberg, Mattias

doi:10.1016/j.nima.2013.02.045

Cited by 24 publications

(3 citation statements)

References 18 publications

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“…3 This analysis assumes there is no memory effect from a previous sample. 4 Memory-effect is the presence of residual activity of radon or xenon that has diffused into the detector from a previous measurement [16][17][18]. A gas-background measurement right before the sample measurement can be used to correct counts for memory effect.…”

Section: Activity Of 222 Rnmentioning

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: Activity Of 222 Rnmentioning

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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“…Early coating attempts used metallic coatings that were sputtered onto the inner surface of the plastic β-cells [38], but the temperature needed to sputter the metal to plastic damaged the scintillating plastic. Separately, FOI and X-Ray Instrumentation Associates, LLC (XIA) studied the suitability of coatings such as Al 2 O 3 to reduce the memory effect [39][40][41][42]. FOI worked with a commercial entity, Nanexa, to develop a coating method using Al 2 O 3 that appears to bond well without negative impact to the detection efficiency, and small impact on resolution.…”

Section: Memory Effect and Backgroundmentioning

confidence: 99%

Radioxenon net count calculations revisited

Cooper

Auer²,

Bowyer

et al. 2019

J Radioanal Nucl Chem

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Since 1998, there have been improvements in the capability to detect atmospheric radioxenon in the International Monitoring System operated by the Preparatory Commission of the Comprehensive Nuclear-Test-Ban Treaty Organization. The upgrades have resulted in next-generation versions of the radioxenon systems. This paper explores radioxenon data analysis improvements beyond the original radioxenon beta-gamma analysis equations that were formulated in 2000. Additionally, it provides recommendations to further improve analysis and refine the equations. The areas of improvement are described in terms of equations, physical detectors, and field-testing. These recommendations are provided with the intention of improving accuracy and precision of radioxenon measurements.

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“…The new CZT-based radioxenon detection system is also expected to significantly reduce the memory effect [24] which is currently observed with radioxenon detectors that use plastic scintillators. The high-Z nature of the CZT material is anticipated to minimize radioxenon diffusion into the detector elements compared to the low-Z nature of plastic scintillator materials.…”

Section: Introductionmentioning

confidence: 99%

135Xe measurements with a two-element CZT-based radioxenon detector for nuclear explosion monitoring

Ranjbar

Farsoni

Becker

2017

Journal of Environmental Radioactivity

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Measurement of elevated concentrations of xenon radioisotopes (Xe, Xe,Xe and Xe) in the atmosphere has been shown to be a very powerful method for verifying whether or not a detected explosion is nuclear in nature. These isotopes are among the few with enough mobility and with half-lives long enough to make their detection at long distances realistic. Existing radioxenon detection systems used by the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) suffer from problems such as complexity, need for high maintenance and memory effect. To study the response of CdZnTe (CZT) detectors to xenon radioisotopes and investigate whether it is capable of mitigating the aforementioned issues with the current radioxenon detection systems, a prototype detector utilizing two coplanar CZT detectors was built and tested at Oregon State University. The detection system measures xenon radioisotopes through beta-gamma coincidence technique by detecting coincidence events between the two detectors. In this paper, we introduce the detector design and report our measurement results with radioactive lab sources andXe produced in the OSU TRIGA reactor. Minimum Detectable Concentration (MDC) for Xe was calculated to be 1.47 ± 0.05 mBq/m.

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Memory effect, resolution, and efficiency measurements of an Al2O3 coated plastic scintillator used for radioxenon detection

Cited by 24 publications

References 18 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

Radioxenon net count calculations revisited

135Xe measurements with a two-element CZT-based radioxenon detector for nuclear explosion monitoring

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