Plutonium generally isn't found in nature. Trace elements of plutonium are found in naturally occurring uranium ores. Here, it is formed in a way similar to neptunium: by irradiation of natural uranium with neutrons followed by beta decay. Primarily, however, plutonium is a byproduct of the...
Old plutonium found in dumpNature - the world's best science and medicine on your desktopdoi:10.1038/news.2009.53BrumfielGeoffNature
A small anomaly in plutonium at about 60 K was found and is possibly caused by magnetic ordering. The specific heat of neptunium is a smooth function... J.,A.,Lee,... - 《Proceedings of the Royal Society A Mathematical Physical & Engineering Sciences》 被引量: 3发表: 1970年 Dispersive...
Plutonium is a metallic chemical element classified among theactinideson the periodic table of elements. This highlyradioactiveelement is used primarily in weapons andnuclear powerplants, and it has become somewhat well known because of these uses. In nature, plutonium is relatively rare, occurring ...
Trace amounts of plutonium-238, plutonium-239, plutonium-240, and plutonium-244 can be found in nature. Small traces of plutonium-239, a few parts per trillion, and its decay products are naturally found in some concentrated ores of uranium,[50] such as the natural nuclear fission reactor ...
PLUTONIUM isotopes, Pu-239,240 and Pu-238 in particular, have been injected into the stratosphere as a result of atmospheric nuclear weapons tests, and hav... E.,P.,HARDY,... - 《Nature》 被引量: 545发表: 1973年 Sources of polonium-210 in atmosphere Mean tropospheric aerosol residence ...
production capability is necessary to help build a “reliable replacement warhead” — a new kind of warhead that is supposed to require less maintenance than existing designs (seeNature442, 18–21; 2006). They argue that these warheads would replace, rather than augment, the existing stockpile....
Plutonium doesn't really exist in nature; it only comes from nuclear reactors. The International Atomic Energy Agency says that there's one place in Africa, called Oklo, where the conditions were just right to create the element naturally. But most plutonium is completely human-made. Plutonium...
Plutonium is the heaviest primordial element 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. Producing plutonium in useful quantities for the first time was a major ...
K. ( 1966 ) Decay properties of plutonium-244, and comments on its existence in nature . Nature 212 , 131 – 134 .FIELDSP. R., FRIEDMANNA. M., MILSTEDJ., LERNER J., STEVENS C. M., METTAD. AND SABINE W. K. (1966) Decay properties of plutonium-244, and comments on its ...