Simulation of the radiation fallout from gamma-ray measurements

Gusev, A. A.; Martin, I. M.; Alves, Mara Lisa; Abreu, A. J. de

doi:10.1007/s40808-015-0016-3

Cited by 10 publications

(13 citation statements)

References 17 publications

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“…Detector and associated electronics were previously calibrated in ITA (Technological Institute of Aeronautics) laboratory using radioactive sources Cs-137, Sr-90 and Po-210. In terms of energy from emitted photons and particles: 1.17 MeV, 0.90 MeV and 5.4 MeV respectively [9]. The rainfall intensity in mm at each sampling minute was observed through a system (bascule/bucket) rain gauge and data logger acquisition developed in ITA according to the international recommendations.…”

Section: Methodsmentioning

confidence: 99%

Environmental Low Energy Gamma Rays Measurements in Brazilian Tropics Region During 2016

Martin¹,

Goussev²,

Vilela³

et al. 2016

JESE-A

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Low energy gamma radiation (0.2-10.0) MeV near the Earth's surface has several origins. Primary and secondary cosmic radiations with interactions of very high energy protons (> 1 GeV) in terrestrial atmosphere are the main sources. The second most important source near the surface of the Earth and in the tropical and equatorial regions is the radon gas (Rn-222) that decays in alpha particles and gamma rays in this energy range. Also the telluric radionuclides 238 U, 235 U, 40 K and 232 Th in decays produce gamma radiation with different intensities at different locations on the surface of the Earth. Other sources less present are electrical discharges (lightning strikes) and man-made radioactive sources for medical, dental and industrial applications. In this work, it is shown that measurements of these components during all year 2016 are carried out at the ITA (Technological Institute of Aeronautics) campus in São José dos Campos, SP, Brazil and their possible correlations with atmospheric phenomena.

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Section: Methodsmentioning

confidence: 99%

Environmental Low Energy Gamma Rays Measurements in Brazilian Tropics Region During 2016

Martin¹,

Goussev²,

Vilela³

et al. 2016

JESE-A

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“…O primeiro passo deste trabalho foi medir a radiação ambiental presente no campus do ITA em São José dos Campos, São Paulo, Brasil, possibilitando identificar os elementos radioativos como bismuto ( 214 Bi), potássio ( 40 K) e tálio ( 208 Tl) 5 . Através do sistema (software e hardware) de aquisição de dados obtiveram-se gráficos da intensidade de radiação versus canal, com uma amostragem ampla de até 1024 canais 6 .…”

Section: Metodologiaunclassified

Medidas da radiação ionizante do meio ambiente local com um detector de raios gama

Carvalho

Martin

Gomes

et al. 2018

RBAV

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Low energy gamma rays up to 10 MeV is a type of high frequency electromagnetic radiation produced by decay of radioactive elements and by electric discharges present in the environment. The intensity of this radiation varies according to the location on the planet. Measurements of gamma radiation from 200 keV to 10.0 MeV were carried out in the Technological Institute of Aeronautics -ITA campus, in São José dos Campos, São Paulo, Brazil. In addition, measurements of this radiation were made within 10 min in the environment with radioactive sources (cesium Cs-137, polonium Po-210, and strontium Sr-90) placed on the scintillator. A generation of the spectra was studied in function of the energy, always in the same time interval. Thus, it was possible to determine the presence of the natural gamma radiation in the soil-atmosphere interface for this energy range. ReSumo Raios gama de baixa energia, até 10 MeV, é um tipo de radiação eletromagnética de alta frequência produzida geralmente por decaimentos radioativos e descargas elétricas presentes no meio ambiente. Essa radiação, cuja intensidade varia a cada localidade do planeta, pode causar danos aos seres vivos. Foram efetuadas medidas da radiação gama de 200 keV até 10,0 MeV no campus do Instituto Tecnológico de Aeronáutica -ITA, em São José dos Campos, São Paulo, Brasil. Também foram realizadas medidas dessa radiação no intervalo de 10 min, no meio ambiente com fontes radioativas (césio Cs-137, polônio Po-210 e estrôncio Sr-90) colocadas sobre o cristal cintilador. Com o estudo da geração dos espectros em função da energia sempre no mesmo intervalo de tempo, foi possível determinar, para este local, a presença da radiação gama natural na interface solo-atmosfera. Palavras-chave: Radiação ionizante, Raios gama, Detector de radiação gama.

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“…The other important source of ionizing radiation in the soil-air interface in the region is the presence of radon gas ( 222 Rn) who is also coming from the disintegration of uranium-238 series. Radon gas decays into 218 Po in alpha particles and, 214 Pb and 214 Bi giving X and gamma from 0.08 MeV to 2.20 MeV which was measured in the air near local soil [9]. In general, radon gas is present always in the rain with winds that arrive before the cold fronts.…”

Section: Introductionmentioning

confidence: 97%

Daily Variability of Radon Gas in Brazilian Tropics Near Ground Level Surface

Martin¹,

Gomes²,

Sismanoglu³

et al. 2015

JESE-A

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By monitoring the ionizing radiation from minute to minute in São José dos Campos, SP, Brazil (230 S, 450 W) using Geiger counter, during January to August 2015, it has confirmed the presence of radon gas in these measures. The observation confirms the existence of a periodicity of 24 hours through the technique (Fast Fourier Transform) applied to the data set, and this cycle can be better visible in longer dry periods. On rainy days or with heavy fog in the region, this periodicity is modified or even disappears. As Geiger do not detect alpha particles due to absorption in the walls of the sensor tube, it measured X and gamma rays coming from the radon gas progeny.

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Simulation of the radiation fallout from gamma-ray measurements

Cited by 10 publications

References 17 publications

Environmental Low Energy Gamma Rays Measurements in Brazilian Tropics Region During 2016

Environmental Low Energy Gamma Rays Measurements in Brazilian Tropics Region During 2016

Medidas da radiação ionizante do meio ambiente local com um detector de raios gama

Daily Variability of Radon Gas in Brazilian Tropics Near Ground Level Surface

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