background: the sources of radioactivity in the environment have natural, terrestrial and extraterrestrial, and anthropogenic origins. plants may get radioactive nuclides in two ways: (i) by the deposition of radioactive fallout, (ii) by absorption from the soil. materials and methods: the concentrations of the natural radionuclides (226ra, 228ra, 40k) and the artificial radionuclide (137cs) in...

natural background radiation is the main source of human exposure to radioactive material. soils naturally have radioactive mineral contents. the aim of this study is to determine natural ((238) u, (232) th, (40) k) and artificial ((137) cs) radioactivity levels in wheat and corn fields of eilam province.hpge detector was used to measure the concentration activity of (238) u and (232) th series...

introduction natural and man made radioactive sources exist in our environment they can enter into our food chains. one of these is the soil-mushroom-human chain. high level doses of natural radiation can cause hazards to humans. materials and methods samples of agaricus bisporus cultivated edible mushroom in tehran province- iran were collected from 7 farms. specific activity of 226ra, 228ra, ...

Abstract. Resuspension of 137Cs from the contaminated ground surface to atmosphere is essential for understanding environmental behaviors and estimating external inhalation exposure residents. Kajino et al. (2016) assessed resuspension flux bare soil forest ecosystems in eastern Japan 2013 using a numerical simulation constrained by air concentration measurements. However, was found underestima...

Cesium-137 (137Cs) is the most important indicator of radioactive pollution in marine environment due to its half-life (Tph: 30.2 years), high fission yield, solubility (70% ionic form) and bioavailability (similar potassium). Soluble radionuclides, like 137Cs, seawater are associated with physicogeochemical biological parameters (e.g. temperature, water density, biota exchange processes, mass ...

Specific activites of natural (40K, 226Ra and 40Th) anthropogenic (137Cs) radionuclides in 30 glutinous rice samples bought from some local retailers department stores Songkhla Province have been measured analyzed. Experiment results were carried out by using a high-purity germanium (HPGe) detector gamma spectrometry analysis system at Radiation Laboratory Thailand Institute Nuclear Technology ...