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radon-222

   Also found in: Encyclopedia 0.01 sec.
radon-222,
a radioactive decay product of radium-226 that has been used to fill permanent implants in tumors. It is being replaced by the more manageable radionuclide iodine-125.


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Crotts has compared the areas where TLPs have been most frequently sighted to regions where Apollo space missions observed evidence of a short-lived radioactive gas, radon-222, escaping from the Moon's interior - a clear sign that some type of geological activity was going on.
Mysterious lunar flashes suggest Moon may not be dead after all by Asian News International
48) Present Study During the 1980s and early 1990s, elevated concentrations of radium-226 and radon-222 in groundwater wells and tap water were reported in Harris County, Texas, particularly in the northwest.
Spatial distribution of orofacial cleft defect births in Harris ... by Walston, Jane / Southern Medical Journal
One isotope, radon-222, for example, decays very quickly into polonium-218 after it is released from a magma chamber--it has a half-life of 3.
Into the mouth of hell: a journey into the crater of an active volcano by Nevala, Amy E. / Oceanus
 
 
 
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