Assuming uniform radioactive labeling of all microspheres, the measured level of radioactivity in a tissue sample is proportional to the number of microspheres.
For instance, because it takes only 8 days for the radioactive isotope iodine-131 to decay away to half its original level of radioactivity, simply waiting should be a fix.
"Well," he says, "at any detectable level of radioactivity, people would get scared.
At this level of radioactivity, a person could die from the briefest of exposures.
Second, in what is now normal in large tracts of Belarus and Ukraine, by dosimeter, for their level of radioactivity.
Radioactive wastes are characterized by their mode of formation, physico-chemical nature and level of radioactivity.
He added that the level of radioactivity was low enough that local communities should not be worried at more waste being left at sites after their cleanup.
It is thepeacetime bomb that goes off, from time to time, killing fish, killing men, gradually building up the level of radioactivity.
The level of radioactivity in the wastewater has sometimes been hundreds or even thousands of times the maximum allowed by the federal standard for drinking water.
The minerals, including 17 tons of copper ore with a level of radioactivity 50 times the country's official tolerable limit, were seized last month in Likasi, a mining town in southern Katanga, as it was being moved for export.
Protection against excessive radiation from radon ought to be bases on the use of materials with a relatively low level of radioactivity.
