CHAIN 链,链条;项圈 chain n. 链,连锁,束缚 v.[T] 用铁练锁住,束缚,囚禁 radioactive a. 1.放射性的 uranium n. 铀 amplifier chain 放大器线路 anti chain 反链 middle of chain 链的中间,链中间单元 start of chain 起始链,链开始 down chain 【计】 下行链路 最新...
Uranium decay series are the products of radioactive decay of uranium isotopes (235U and238U). U decay series are an essential tool of modern geochronology for ages ranging between a few years to one million years. This is due both to the excellent temporal resolution afforded by U-series dat...
Secular equilibrium can only occur in a radioactive decay chain if the half-life of the daughter radioisotope is much shorter than the half-life of the parent radioisotope, as typical of the uranium series decay chains. Uranium series disequilibrium: Unequal radioactivity of the intermediate ...
because, besides being weakly radioactive, uranium is a toxic metal.[31][136][137] Uranium is also a reproductive toxicant.[138][139] Radiological effects are generally local because alpha radiation, the primary form of 238U decay, has a very short range, and will ...
Uranium-235 undergoes spontaneous fission during radioactive decay; however, no standard equation can represent this reaction as its results are quite unpredictable. Uranium-235 Decay Chain The decay chain of this radioactive metal is known as the Actinium Series with thorium-231 being the next isot...
In comparison, the most radioactive element ispolonium. It has a half-life of a mere 138 days. Still, uranium has explosive potential, thanks to its ability to sustain a nuclear chain reaction. U-235 is "fissile," meaning that its nucleus can be split by thermal neutrons — neutrons with...
Eliminating that excuse, or at least making it statistically implausible, is the idea behindthis radioactively random dice roller. It comes to us from [Science Shack] and uses radioactive decay to generate truly random numbers, as opposed to the pseudorandom number generators baked into most mic...
Uranium-238 is the parent and uranium-234 one of the daughters in the radioactive uranium decay series; uranium-235 is the parent of the actinium decay series. See also actinoid element. The element uranium became the subject of intense study and broad interest after German chemists Otto Hahn...
Uranium is also an α-particle emitter, and many of its radioactive decay products, including radon as the uranium decay chain begin with 238U culminates in 206Pb. Αlpha particles are bulky (2 protons and 2 neutrons) and cannot penetrate human skin, but when particulate matter containing ...
Tags Age Decay Earth Radioactive Radioactive decay Uranium T}T = ln(0.0073)/(\lambda_{238} - \lambda_{235}).In summary, by setting up the equation for the decay of Uranium 238 and considering the ratio of Uranium 235 to Uranium 238, it can be shown that the age of the Earth is ...