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Dynamics of Environmental Ionizing radiation between May to September 2016 in the Region of S^o Jos~ dos Campos, SP, Brazil

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Journal of Environmental Science and Engineering(B) 2016年第9期5卷 451-456页

作者： Inacio M. Martin Marcelo P. Gomes Mauro A. Alves Alessandro de Abreu Franklin A. Silva Rodrigo R. F.Carvalho Joao P. Correa Bogos N. Sismanoglu Physics Department Technological Institute of Aeronautics-ITA S6o Jos~ dos Campos SP 12228-900 Brazil

measurements.of gamma radiation （200 keV to 10 MeV） were performed between May 25 to September 30 2016 at ITA （Technological Institute of Aeronautics） in Sao Jose dos Campos, SP, Brazil. Detector and associated electronics were previously calibrated in the laboratory of ITA using radioactive sources Cs-137, Po-210 and Sr-90. These sources provide gamma-ray energies in 0.662 keV alpha particles of 5.4 MeV and 0.90 keV electrons, respectively. Detector is a scintillator Sodium Iodide activated with Thallium [NaI（Tl）] associated to a photomultiplier and electronic devices which gather, store, distribute and structure data so users can analyze them. During the period of May-September, the experimental set was installed in an open room on a tower 25 meters above the ground. measurements.indicated variations of ionizing radiation in function of dry weather, rain, cold fronts passes and presence of fog in the area; the sample time interval was minute by minute. This study discusses the analysis and the dynamics of how to measure meteorological parameters using an ionizing radiation system.

关键词： Ionizing radiation environmental study gamma radiation measurements.

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Study of a Portable Experimental Set for the Monitoring of Ionizing radiation in the Tropical Region of Brazil

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Journal of Environmental Science and Engineering(A) 2017年第3期6卷 144-148页

作者： Inacio Malmonge Martin Marcelo Pego Gomes Rodrigo Rezende Fernandes Carvalho and Rafael Gomes Physics Department Technological Institute of Aeronautics-ITA Sao Jose dos Campos SP 12228-900 Brazil

The Geiger is a proportional counter that detects the ambient ionizing radiation using a sensor tube and an associated electronics that allows feeding the desired voltage to the tube and acquiring the data in a certain time interval. With a sensor tube of Chinese and Russian origin and associated electronics based on the Arduino system, an experimental set of very low cost and easy handling for the monitoring of the local environmental ionizing radiation was set up. The main objective of this work is to disseminate this very low cost technique for the environmental study in secondary schools in Brazil.

关键词： Ionizing radiation environmental study gamma radiation measurements.

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