This is report about:
The total amounts of radioactively contaminated materials in forests in Fukushima.
The whole Scientific Report can be found here:
_http://www.nature.com/srep/2012/120525/srep00416/full/srep00416.html
The total amounts of radioactively contaminated materials in forests in Fukushima.
The whole Scientific Report can be found here:
_http://www.nature.com/srep/2012/120525/srep00416/full/srep00416.html
Radioactive contamination has been widely but inhomogeneously found in eastern Japan, even in areas hundreds of kilometers away from the plant1, 2, 3, 4. Airborne surveys revealed that the contamination spread widely, but areas northwest of the plant, from the immediate vicinity of the plant to approximately 60 km away, were found to be notably heavily contaminated (e.g. ≥ 134, 137Cs 1000 kBq m−2)1, 2. The two major radioactive elements found to be widely deposited are iodine (131I) and cesium (primarily 134Cs and 137Cs). Because the half-lives of 131I, 134Cs, and 137Cs are 8 days, 2 years, and 30 years, respectively, the decontamination of cesium (especially 137Cs) is now the crucial issue.