Radionuclides and heavy metals/metalloids content in soils shore sediments of Al-Negila area (Matrouh, Egypt) were determined to assess the associated environmental risks. A total 46 soil sediment samples collected analysed for natural man-made radionuclides (238U series, 232Th 40K 137Cs) (Al, B, Ba, Ca, Cd, Co, Cr, Cu, Fe, Mn, Ni, Si, Sr, Zn, Hg). Within study area, are mainly calcareous with ...

Relative absorbed dose energy response correction, R, for various radiochromic films in water phantom is calculated by the use of the Monte Carlo-based EGSnrc code system for high energy brachytherapy sources 60Co, 137Cs, 192Ir and 169Yb. The corrections are calculated along the transverse axis of the sources (1-15 cm). The radiochromic films investigated are EBT, EBT2 (lot 020609 and lot 03110...

A large-scale heavy rainfall disaster occurred in Joso City, Japan, in September 2015, and one third of the city area (40 km2) was flooded by the Kinu River. Artificial radionuclides such as 134Cs and 137Cs were known to have accumulated in the river bottom sediment after their release in the 2011 Fukushima Dai-ichi Nuclear Power Plant accident. It was thought that these radionuclides might hav...

Quantifying the amount of cesium incorporated into marine sediments as a result of the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident has proven challenging due to the limited multi-core sampling from within the 30 km zone around the facility; the inherent spatial heterogeneities in ocean sediments; and the potential for inventory fluctuations due to physical, biological, and chemical ...

Introduction We would like to present the use of another natural radionuclide chain, that of 232Th. It is suggested to be used as a relative energy calibrator, while absolute calibration will be done by a standard source of 137Cs which, due to its long half-life, requires a change of the calibrated standard only in about 30 to 50 years. Most Ge detector/MCA set-ups are calibrated for energy and...

内山正史:放 射線医学総合研究所環境衛生研究部,千 葉市穴川4-9-1〒280 Caesium-137/Biological Half-Life/Japanese The biological half-life of 137Cs in the total body of human subjects was determined in 23 individuals of Japanese male adult in their normal works by measuring amount of 137Cs in both their total body and daily urine in the same period. For the group, the value was determined by averaging the half-lives for indiv...