Automatic Counting of Electrochemically Etched Tracks in Compact Discs. Application to Retrospective Measurements of Rn-222

Mitev, K.; Madzhunkov, Y.; Gerganov, G.; Dimitrova, I.; Georgiev, S.; Pressyanov, D.

doi:10.1109/tns.2009.2036436

Cited by 25 publications

(4 citation statements)

References 34 publications

(43 reference statements)

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“…After that, electrochemical etching is applied and the tracks are counted automatically. The etching procedure is described in detail in [2] and the automatic track counting by a computer scanner in [8]. The analyzed signal is the net track density (the track density after the background is subtracted).…”

Section: Methodsmentioning

confidence: 99%

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Testing and Calibration of CDs as Radon Detectors at Highly Variable Radon Concentrations and Temperatures

Pressyanov

Poncela

Georgiev

et al. 2019

IJERPH

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The application of the compact disk (CD) method for radon measurements at mines, caves and other workplaces needs testing under highly variable exposure conditions. We present the results from a blind comparison of CDs exposed in the Laboratory of Natural Radiation (Saelices el Chico, Spain). During the exposure the temperature varied from 6.5 to 24.9 °C (average 12.6 °C) and the 222Rn activity concentrations varied from <10 Bq m−3 to 147 kBq m−3. Good correspondence was observed between the integrated 222Rn activity concentration determined by the reference instruments in the laboratory (122,500 ± 6100 kBq h m−3) and that assessed by analysis of the CDs at a depth 80 µm beneath the front surface (118,000 ± 12,000 kBq h m−3) and at a depth of 120 µm (106,000 ± 12,000 kBq h m−3). The theoretical modeling of the CD response under variable temperature and radon concentration suggested that the small bias is probably due to the time variation of the calibration factor because of the time variations of the temperature.

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Section: Methodsmentioning

confidence: 99%

“…Since the track density decreases in depth [8], the CF at temperature 12.6 °C at depth 80 µm is 3.3 times greater than the CF at 120 µm. Analysis at depths greater than 80 µm can be useful when the signal at 80 µm is high and approaches the saturation level.…”

Section: Methodsmentioning

confidence: 99%

Testing and Calibration of CDs as Radon Detectors at Highly Variable Radon Concentrations and Temperatures

Pressyanov

Poncela

Georgiev

et al. 2019

IJERPH

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“…After that the tracks at the studied depth are revealed by electrochemical etching and counted visually or automatically. These procederes are described in detail elsewhere [13,14]. x In the second version of the polycarbonate method, the polycarbonate material serves as "absorber/radiador".…”

Section: Methodsmentioning

confidence: 99%

Measuring radioactive noble gases by absorption in polycarbonates and other organics: From radon indoors to nuclear safety

Pressyanov¹

2013

AIP Conference Proceedings

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Simple, discriminative measurement technique for radon and thoron concentrations with a single scintillation cell Rev. Sci. Instrum. 73, 69 (2002); 10.1063/1.1416121 POINT/COUNTERPOINT: The LNT model is appropriate for the estimation of risk from low-level (less than 100 mSv/year) radiation, and Low levels of radon in homes should be considered harmful to health Med.Abstract. The report summarizes recent research and practice of using materials with high absorption ability to noble gases to measure their radioactive isotopes. Most of the studies employ bisphenol-A based polycarbonates, because of their remarkably high absorption ability to noble gases. This is the material of which commercial CDs/DVDs are made and they may serve as serendipitous, already available in dwellings, radon and thoron detectors. We present the essence of the gathered experimental evidence that the CD/DVD method can successfully address some long-lasted problems in radon dosimetry: The first is making sufficiently precise retrospective 222 Rn dosimetry for the purposes of epidemiological studies and risk estimation. The second is rapid identification of buildings with radon problem. We demonstrate how this can be used to develop an integrated approach to the radon problem. Within this approach detection, diagnostic and mitigation are considered as an unified whole, and the interval between the decision to provide disks for analysis and the complete mitigation of the building, if radon problem is identified, is short. Besides radon and thoron, bisphenol-A based polycarbonates were successfully used to measure 85 Kr and 133 Xe for the purposes of the effluents control and nuclear safety of nuclear installations. The perspectives to employ other organic materials in which noble gases are highly soluble for measurement of their radioactive isotopes are also discussed. 133 Xe both in laboratory and real conditions [9,10]. In all of these directions the "polycarbonate method" demonstrated sufficient potential for practical applications. The most prospective is the use of RADIATION PHYSICS AIP Conf. DiagnosticsIncludes source identification, routes of entry, radon distribution etc.Usually needs 1-2 weeks to perform MitigationDepending on the type and size of the building usually needs from one week to 1-2 months.

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“…This underestimation was corresponding to higher densities of tracks which could be corrected using a relation obtained between the tracks measured by the optical method and spark counting. Mitev et al (15) described an algorithm capable of reliably separating the overlapping tracks and ignores artifacts in the image. The algorithm was validated by comparison to manual counting.…”

Section: Downloaded By [York University Libraries] At 00:15 20 Novembmentioning

confidence: 99%

Supervised nuclear track detection of CR-39 detectors by cellular automata

Nejad

Khayat

Mohammadi

et al. 2013

Radiation Effects and Defects in Solids

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In this paper, cellular automata are used to detect the nuclear tracks in the track images captured from the surface of CR-39 detectors. Parameters of the automaton as the states, neighborhood, rules and quality parameters are defined optimally for the track image data set under analysis. The presented method is a supervised computational algorithm which comprises a rule definition phase as the learning procedure. Parameter optimization is also performed to adapt the algorithm to the data set used.

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Automatic Counting of Electrochemically Etched Tracks in Compact Discs. Application to Retrospective Measurements of Rn-222

Cited by 25 publications

References 34 publications

Testing and Calibration of CDs as Radon Detectors at Highly Variable Radon Concentrations and Temperatures

Testing and Calibration of CDs as Radon Detectors at Highly Variable Radon Concentrations and Temperatures

Measuring radioactive noble gases by absorption in polycarbonates and other organics: From radon indoors to nuclear safety

Supervised nuclear track detection of CR-39 detectors by cellular automata

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