<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

Pubblicato online: 29 mag 2020

Pagine: 115 - 119

Ricevuto: 02 dic 2019

Accettato: 17 gen 2020

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

Parole chiave
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

Pubblicato online: 29 mag 2020

Pagine: 115 - 119

Ricevuto: 02 dic 2019

Accettato: 17 gen 2020

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

Parole chiaveBi/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

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