<abstract xmlns="http://www.w3.org/1999/xhtml">Continuous monitoring of natural gamma radiation in air has been carried out, during December 2014 – January 2018, with 1-min cyclic measurement in Prague, Czech Republic using a NaI(Tl) probe. The 214Bi/214Pb ratio as a tracer in rainwater has been investigated to study its variations related to both the ambient dose equivalent rate per hour and the amount of rainfall. A hybrid methodology for time series analysis, composed of the aggregation of two signal decomposition methods (multiple linear regression and empirical mode decomposition) and one forecasting method (support vector regression), has been applied to identify the anomalies in the studied signals in order to better find correlations among them. The results show a strong correlation between the ambient dose equivalent rate and the 214Bi/214Pb ratio values and between both these signals and rainfall amount ≥5 mm/h. Furthermore, the considered descendants of radon are mainly responsible for the overall ambient dose equivalent rate.</abstract>

Continuous monitoring of natural gamma radiation in air has been carried out, during December 2014 – January 2018, with 1-min cyclic measurement in Prague, Czech Republic using a NaI(Tl) probe. The 214Bi/214Pb ratio as a tracer in rainwater has been investigated to study its variations related to both the ambient dose equivalent rate per hour and the amount of rainfall. A hybrid methodology for time series analysis, composed of the aggregation of two signal decomposition methods (multiple linear regression and empirical mode decomposition) and one forecasting method (support vector regression), has been applied to identify the anomalies in the studied signals in order to better find correlations among them. The results show a strong correlation between the ambient dose equivalent rate and the 214Bi/214Pb ratio values and between both these signals and rainfall amount ≥5 mm/h. Furthermore, the considered descendants of radon are mainly responsible for the overall ambient dose equivalent rate.

214Bi/214Pb radioactivity ratio three-year monitoring in rainwater in Prague

University of Campania “Luigi Vanvitelli”

Faculty of Nuclear Sciences and Physical Engineering

Nukleonika

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Bi/Pb radioactivity ratio three-year monitoring in rainwater in Prague

Continuous monitoring of natural gamma radiation in air has been carried out, during December 2014 – January 2018, with 1-min cyclic measurement in Prague,...

²¹⁴Bi/²¹⁴Pb radioactivity ratio three-year monitoring in rainwater in Prague

Publié en ligne: 29 mai 2020

Pages: 115 - 119

Reçu: 02 déc. 2019

Accepté: 17 janv. 2020

DOI: https://doi.org/10.2478/nuka-2020-0018

Mots clés
Bi/Pb gamma-ray ratio, Ambient dose equivalent rate, Hybrid method, Rainfall, Time-series analysis

© 2020 Fabrizio Ambrosino et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

214Bi/214Pb radioactivity ratio three-year monitoring in rainwater in Prague

Publié en ligne: 29 mai 2020

Pages: 115 - 119

Reçu: 02 déc. 2019

Accepté: 17 janv. 2020

DOI: https://doi.org/10.2478/nuka-2020-0018

Mots clésBi/Pb gamma-ray ratio, Ambient dose equivalent rate, Hybrid method, Rainfall, Time-series analysis

© 2020 Fabrizio Ambrosino et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

²¹⁴Bi/²¹⁴Pb radioactivity ratio three-year monitoring in rainwater in Prague

Mots clés
Bi/Pb gamma-ray ratio, Ambient dose equivalent rate, Hybrid method, Rainfall, Time-series analysis