Medida da contaminação radioativa do ar ambiental por radonio-222 e filhos em residencias de Campinas-SP, Brasil

AUTOR(ES)
DATA DE PUBLICAÇÃO

2000

RESUMO

In this work we have employed for the first time a Monitoring Methodology, developed by our research group, to study Radon-222 ( 222Rn) and daughters environmental contamination. We carried out a survey in Campinas-SP, Brazil, exposing in the same rooms of 70 dwellings plastic detectors (CR-39) during two successive periods of 6 months: the first one from November/96 to May/97 and the second one from May/97 to December/97. The alpha activities due to 222 Rn and daughters ( 218Po and 214Po) in the air and due to Radon daughters plated-out on material surfaces have been measured and correlated with exposures and dwellings data. This procedure enabled an improvement on the knowledge of this contamination and factors that influence its magnitude . Finally, we have shown up the reasons that make the monitoring of Radon and daughters quite difficult, stressing the main advantage of our methodology, where the plastic detector, CR-39, is employed as an alpha spectrometer

ASSUNTO(S)

radonio-222 e filhos - medição - campinas (sp)

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