Обсуждение:Изотопы плутония (KQvr';yuny&N[kmkhd hlrmkunx)

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Плутоний-244 - [1] (?период полураспада – 120 млн лет) --Tpyvvikky

Ну, раз никаких.. --Tpyvvikky 12:18, 13 января 2016 (UTC) (вот какой, кстати, период полураспада..?)[ответить]

http://education.jlab.org/itselemental/ele094.html "plutonium-244, has a half-life of about 82,000,000 years" http://periodic.lanl.gov/94.shtml

Plutonium is the heaviest primordial element in existence by virtue of its most stable isotope, plutonium-244, whose half-life of about 80 million years is just long enough for the element to be found in trace quantities in nature. In 1971 mass spectrometric measurements of plutonium isolated from Precambrian bastnasite (a lanthanide chloride-fluoride mineral) by Hoffman and coworkers confirmed the presence of Pu-244 in nature. Although the existence of Pu-244 as an extinct radioactive element had been postulated to explain the xenon isotope ratios observed in meteorites, this is the first indication of its present existence in nature.

http://www.nature.com/nature/journal/v234/n5325/abs/234132a0.html - Detection of Plutonium-244 in Nature / Nature 234, 132 - 134 (19 November 1971); doi:10.1038/234132a0