226 Ra determination via the rate of 222 Rn ingrowth with the Radium Delayed Coincidence Counter (RaDeCC)
226 Ra determination via the rate of 222 Rn ingrowth with the Radium Delayed Coincidence Counter (RaDeCC)
We present a new method to determine 226 Ra in aqueous environmental samples, based on the rate of ingrowth of 222 Rn from 226 Ra, using the radium delayed coincidence counter (RaDeCC). We use the same instru- ment setup that is used for the determination of 223 Ra and 224 Ra. In contrast to methods published earlier, the approach does not require a modification of the counting equipment, counting separately for 226 Ra, or waiting for radioactive equilibrium. We show that the calibration works from as low as 10 dpm (0.166 Bq) per sample, up to more than 1000 dpm (16.7 Bq). Although uncertainties are larger (typically around 10%) than reported uncertainties for γ counting, liquid scintillation, or mass spectrometry at comparable activities, the simple setup, low cost, and robustness of the method make it a useful approach for underway measurements, combi- nations with short-lived radium isotopes, or monitoring purposes when limited funding or infrastructure is available.
594-603
Geibert, Walter
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Rodellas, Valentí
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Annett, Amber
de404d72-7e90-4dbd-884a-1df813808276
van Beek, Pieter
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Garcia-Orellana, Jordi
1e8e647e-b35b-40ff-a540-068c7dcd6afe
Hsieh, Yu-Te
e61cbc9a-d3a5-419a-8c4d-f0f0aed1fa5c
Masque, Pere
b8cd25a1-6622-4443-813c-4c851f030e49
November 2013
Geibert, Walter
c3679aba-8aab-40ec-ae0e-2112a4c6d471
Rodellas, Valentí
2b9fd266-ffc3-4a85-8ece-a87f648c9279
Annett, Amber
de404d72-7e90-4dbd-884a-1df813808276
van Beek, Pieter
1a0b89c0-4695-4268-9cc0-31a1d322b063
Garcia-Orellana, Jordi
1e8e647e-b35b-40ff-a540-068c7dcd6afe
Hsieh, Yu-Te
e61cbc9a-d3a5-419a-8c4d-f0f0aed1fa5c
Masque, Pere
b8cd25a1-6622-4443-813c-4c851f030e49
Geibert, Walter, Rodellas, Valentí, Annett, Amber, van Beek, Pieter, Garcia-Orellana, Jordi, Hsieh, Yu-Te and Masque, Pere
(2013)
226 Ra determination via the rate of 222 Rn ingrowth with the Radium Delayed Coincidence Counter (RaDeCC).
Limnology and Oceanography: Methods, 11 (11), .
(doi:10.4319/lom.2013.11.594).
Abstract
We present a new method to determine 226 Ra in aqueous environmental samples, based on the rate of ingrowth of 222 Rn from 226 Ra, using the radium delayed coincidence counter (RaDeCC). We use the same instru- ment setup that is used for the determination of 223 Ra and 224 Ra. In contrast to methods published earlier, the approach does not require a modification of the counting equipment, counting separately for 226 Ra, or waiting for radioactive equilibrium. We show that the calibration works from as low as 10 dpm (0.166 Bq) per sample, up to more than 1000 dpm (16.7 Bq). Although uncertainties are larger (typically around 10%) than reported uncertainties for γ counting, liquid scintillation, or mass spectrometry at comparable activities, the simple setup, low cost, and robustness of the method make it a useful approach for underway measurements, combi- nations with short-lived radium isotopes, or monitoring purposes when limited funding or infrastructure is available.
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Published date: November 2013
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Local EPrints ID: 415786
URI: http://eprints.soton.ac.uk/id/eprint/415786
ISSN: 1541-5856
PURE UUID: 7b69659a-cd80-47ed-bc53-95fe4d8a4f87
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Date deposited: 24 Nov 2017 17:30
Last modified: 16 Mar 2024 04:30
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Contributors
Author:
Walter Geibert
Author:
Valentí Rodellas
Author:
Pieter van Beek
Author:
Jordi Garcia-Orellana
Author:
Yu-Te Hsieh
Author:
Pere Masque
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