Calibration and optimization of alpha-beta separation procedures for determination of radium/radon in single- and two-phase liquid scintillation systems

Bhade, S. P. D.; Reddy, Priyanka J.; Anilkumar, S.; Singhal, R. K.; Rao, D. D. Bhaktavatsala

doi:10.1007/s10967-017-5643-x

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…The calibration factor CF (detection efficiency for 222 Rn, 218 Po, and 214 Po radionuclides) was consistent for all 226 Ra concentration activities. Similar CF dependencies on PSA values have been reported by other authors ( 6 , 7 , 29 ). It is clear that CF plateaus when PSA values are set between 40 and 90.…”

Section: Methodssupporting

confidence: 90%

“…The third possibility is the simplest but not as precise as the previous two. It requires recording the dependence of CF on PSA and selection of a working PSA discriminator within the range in which CF factor does not vary significantly ( 7 , 29 ). This technique provides an optimal range for PSA selection, even though its value may lower the counting precision for up to a few percent, but the advantage is that this range does not vary significantly between different scintillation cocktails.…”

Section: Methodsmentioning

confidence: 99%

“…One method that fits the bill is liquid scintillation counting (LSC). It is the most sensitive, widely used, reliable, effective, and suitable method for 222 Rn and 226 Ra measurement and a variety of purposes, from drinking water monitoring and groundwater radiological assessment to environmental tracer research ( 6 , 7 , 8 ). LSC can measure Ra indirectly through 222 Rn measurement, since 222 Rn is generated by 226 Ra decay inside a scintillation vial and spontaneously extracted to a water-immiscible scintillation cocktail from the aqueous phase ( 6 ).…”

mentioning

confidence: 99%

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Radium interference during radon measurements in water: comparison of one- and two-phase liquid scintillation counting

Stojković

Todorović

Nikolov

2021

Archives of Industrial Hygiene and Toxicology

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Assessment of radiation exposure to drinking, surface, and groundwater and of the associated health risks calls for accurate and precise 226Ra and 222Rn measurements. One method that fits the bill is liquid scintillation counting (LSC), which allows measurements in one-phase (homogenous) or two-phase samples. The aim of our study was to compare the measurement efficiency with both variations in Niška Banja spa water, known for its elevated 222Rn content to get a better insight into the stability and behaviour of the samples and 226Ra interference in samples spiked with 226Ra with 222Rn measurement. 226Ra interference was more evident in homogenous, one-phase and much lower in two-phase samples. However, one-phase samples offer more accurate indirect 226Ra measurements. Water-immiscible cocktails (in two-phase samples) have shown a limited capacity for receiving 222Rn generated by Ra decay from the aqueous to organic phase when 222Rn/226Ra equilibrium is reached. We have also learned that samples with naturally high 222Rn content should not be spiked with 226Ra activities higher than the ones found in native samples and that calibration of two-phase samples can be rather challenging if measurements span over longer time. Further research would require much lower 226Ra activities for spiking to provide more practical answers to questions arising from the demonstrated phenomena.

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Section: Methodssupporting

confidence: 90%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Radium interference during radon measurements in water: comparison of one- and two-phase liquid scintillation counting

Stojković

Todorović

Nikolov

2021

Archives of Industrial Hygiene and Toxicology

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“…Also, several scintillators were used to determine their response to 3 H/ 14 C [27]. Another type of commercial liquid scintillator has been used to measure the radon-to-radium ration [28], and in the area of biomaterials [29].…”

Section: Introductionmentioning

confidence: 99%

The Three-Body Structure of 2n and 2p Halo Nuclei

Sreeja

Balasubramaniam

2018

JNP

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UltimaGold TM AB and OptiphaseTrisafe are two liquid scintillators made by Perkin Elmer and EG & G Company respectively. Both are commercially promoted as scintillation detectors for α and β particles. In this work, the responses to γ-rays and neutrons of UltimaGold TM AB and OptiphaseTriSafe liquid scintillators, without and with reflector, have been measured aiming to use these scintillators as γ-rays and neutron detectors. Responses to γ-rays and neutrons were measured as pulse shape spectra in a multichannel analyzer. Scintillators were exposed to gamma rays produced by 137 Cs, 54 Mn, 22 Na and 60 Co sources. The response to neutrons was obtained with a 241 AmBe neutron source that was measured to 25 and 50 cm from the scintillators. The pulse height spectra due to gamma rays are shifted to larger channels as the photon energy increases and these responses are different from the response due to neutrons. Thus, UltimaGold TM AB and OptiphaseTrisafe can be used to detect γ-rays and neutrons.

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Liquid Scintillation Based In-Vitro Analysis of Various Radionuclides in Bioassay Samples

Bhade,

Reddy

2024

Handbook on Radiation Environment, Volume 2

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Calibration and optimization of alpha-beta separation procedures for determination of radium/radon in single- and two-phase liquid scintillation systems

Cited by 7 publications

References 14 publications

Radium interference during radon measurements in water: comparison of one- and two-phase liquid scintillation counting

Radium interference during radon measurements in water: comparison of one- and two-phase liquid scintillation counting

The Three-Body Structure of 2n and 2p Halo Nuclei

Liquid Scintillation Based In-Vitro Analysis of Various Radionuclides in Bioassay Samples

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