Preprints
https://doi.org/10.5194/egusphere-2023-2680
https://doi.org/10.5194/egusphere-2023-2680
21 Nov 2023
 | 21 Nov 2023

Full characterization and calibration of a transfer standard monitor for atmospheric radon and thoron measurements

Roger Curcoll, Claudia Grossi, Stefan Röttger, and Arturo Vargas

Abstract. In this work a full characterization of the new user-friendly version of the Atmospheric Radon MONitor (ARMON), used to measure very low activity concentrations of the radioactive radon gas in the outdoor atmosphere, is carried out. The ARMON is based on the electrostatic collection of 218Po+ particles on a semiconductor detector surface. A main advantage of this instrument is offering high resolution alpha energy spectra which will allow to separate radon progeny (210Po, 218Po and 214Po). The monitor feature may also allow measurements of thoron (220Rn) by collection of 216Po+.

In this work the physical principle, the hardware configuration and the software development of the automatic and remotely controlled ARMON, conceived and constructed within the MAR2EA and the traceRadon projects, are described. The monitor efficiency and its linearity over a wide spam of radon concentration activities has been here evaluated and tested using theoretical as well as experimental approaches. Finally, a complete budget analysis of the total uncertainty of the monitor was also achieved.

Results from the application of a simplified theoretical approach shows a detection efficiency for 218Po+ of about 0.0075 (Bq m‑3)-1 s-1. The experimental approach, consisting of exposing the ARMON at controlled radon concentrations between few hundreds to few thousands of Bq m-3, gives a detection efficiency for 218Po+ of 0.0057 ± 0.0002 (Bq m-3) s-1. This last value and its independence from the radon levels was also confirmed thanks to a new calibration method which allows, using low emanation sources, to obtain controlled radon levels of few tens of Bq m‑3.

The total uncertainty of the ARMON detection efficiency obtained for hourly radon concentration above 5 Bq m-3 was lower than 10 % (k=1). The characteristics limits of the ARMON were also calculated, being those dependent on the presence of thoron in the sampled air, and a value of 0.132 Bq m-3 was estimated in thoron absence. Current results may allow to confirm that the ARMON is suitable to measure low-level radon activity concentration (1 Bq m‑3 – 100 Bq m‑3) and to be used as transfer standard to calibrate secondary atmospheric radon monitors.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.

Journal article(s) based on this preprint

21 May 2024
Full characterization and calibration of a transfer standard monitor for atmospheric radon measurements
Roger Curcoll, Claudia Grossi, Stefan Röttger, and Arturo Vargas
Atmos. Meas. Tech., 17, 3047–3065, https://doi.org/10.5194/amt-17-3047-2024,https://doi.org/10.5194/amt-17-3047-2024, 2024
Short summary
Roger Curcoll, Claudia Grossi, Stefan Röttger, and Arturo Vargas

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2023-2680', Scott Chambers, 28 Nov 2023
    • AC1: 'Reply on CC1', Roger Curcoll Masanes, 20 Dec 2023
      • CC2: 'Reply on AC1', Scott Chambers, 22 Dec 2023
        • AC2: 'Reply on CC2', Roger Curcoll Masanes, 12 Jan 2024
          • CC3: 'Reply on AC2', Scott Chambers, 18 Jan 2024
  • RC1: 'Comment on egusphere-2023-2680', Anonymous Referee #1, 25 Jan 2024
    • AC3: 'Reply on RC1', Roger Curcoll Masanes, 11 Mar 2024
  • RC2: 'Comment on egusphere-2023-2680', Anonymous Referee #2, 12 Feb 2024
    • AC4: 'Reply on RC2', Roger Curcoll Masanes, 11 Mar 2024

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2023-2680', Scott Chambers, 28 Nov 2023
    • AC1: 'Reply on CC1', Roger Curcoll Masanes, 20 Dec 2023
      • CC2: 'Reply on AC1', Scott Chambers, 22 Dec 2023
        • AC2: 'Reply on CC2', Roger Curcoll Masanes, 12 Jan 2024
          • CC3: 'Reply on AC2', Scott Chambers, 18 Jan 2024
  • RC1: 'Comment on egusphere-2023-2680', Anonymous Referee #1, 25 Jan 2024
    • AC3: 'Reply on RC1', Roger Curcoll Masanes, 11 Mar 2024
  • RC2: 'Comment on egusphere-2023-2680', Anonymous Referee #2, 12 Feb 2024
    • AC4: 'Reply on RC2', Roger Curcoll Masanes, 11 Mar 2024

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Roger Curcoll Masanes on behalf of the Authors (11 Mar 2024)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (26 Mar 2024) by Ute Karstens
AR by Roger Curcoll Masanes on behalf of the Authors (27 Mar 2024)  Manuscript 

Journal article(s) based on this preprint

21 May 2024
Full characterization and calibration of a transfer standard monitor for atmospheric radon measurements
Roger Curcoll, Claudia Grossi, Stefan Röttger, and Arturo Vargas
Atmos. Meas. Tech., 17, 3047–3065, https://doi.org/10.5194/amt-17-3047-2024,https://doi.org/10.5194/amt-17-3047-2024, 2024
Short summary
Roger Curcoll, Claudia Grossi, Stefan Röttger, and Arturo Vargas
Roger Curcoll, Claudia Grossi, Stefan Röttger, and Arturo Vargas

Viewed

Total article views: 407 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
252 122 33 407 15 11
  • HTML: 252
  • PDF: 122
  • XML: 33
  • Total: 407
  • BibTeX: 15
  • EndNote: 11
Views and downloads (calculated since 21 Nov 2023)
Cumulative views and downloads (calculated since 21 Nov 2023)

Viewed (geographical distribution)

Total article views: 414 (including HTML, PDF, and XML) Thereof 414 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 21 May 2024
Download

The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
The new version of the Atmospheric Radon MONitor (ARMON) is presented. The monitor efficiency and its linearity over a wide spam of radon concentration activities is evaluated and tested, with a complete budget analysis of the total uncertainty. Results obtained supports the applicability of the ARMON to measure low-level radon activity concentration with an uncertainty lower than 10 % and to be used as transfer standard to calibrate secondary atmospheric radon monitors.