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According to Glaser, [3] early centrifuges had rotor diameters of 7.4 to 15 cm and lengths of 0.3 to 3.2 m, and the peripheral speed was 350 to 500 m/s. The modern centrifuge TC-21 of Urenco has a diameter of 20 cm and a length of more than 5 m, spinning with 770 m/s.
Actinides [1] by decay chain Half-life range Fission products of 235 U by yield [2] 4n 4n + 1 4n + 2 4n + 3 4.5–7% 0.04–1.25% <0.001% 228 Ra № 4–6 a: 155 Eu þ: 248 Bk [3] > 9 a: 244 Cm ƒ: 241 Pu ƒ: 250 Cf 227 Ac № 10–29 a: 90 Sr 85 Kr 113m Cd þ: 232 U ƒ: 238 Pu ƒ: 243 Cm ƒ: 29–97 a: 137 Cs 151 Sm þ: 121m Sn 249 Cf ƒ: 242m ...
Weapons-grade plutonium is defined as containing no more than 7% 240 Pu; this is achieved by only exposing 238 U to neutron sources for short periods of time to minimize the 240 Pu produced. Plutonium is classified according to the percentage of the contaminant plutonium-240 that it contains: Supergrade 2–3%; Weapons grade 3–7%; Fuel grade ...
The Mystery of Matter: Search for the Elements is a 2014 American documentary miniseries, [1] [2] [3] which premiered nationwide on August 19, 2015. [4] [5] [6] The PBS documentary, in three-episodes of one hour each, was directed by Stephen Lyons and Muffie Meyer.
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Enriched uranium is a type of uranium in which the percent composition of uranium-235 (written 235 U) has been increased through the process of isotope separation.Naturally occurring uranium is composed of three major isotopes: uranium-238 (238 U with 99.2732–99.2752% natural abundance), uranium-235 (235 U, 0.7198–0.7210%), and uranium-234 (234 U, 0.0049–0.0059%).
It is the acid anion that influences the degree of complexing—how atoms connect to a central atom—of the plutonium species. Additionally, the formal +2 oxidation state of plutonium is known in the complex [K(2.2.2-cryptand)] [Pu II Cp″ 3], Cp″ = C 5 H 3 (SiMe 3) 2. [5] A +8 oxidation state is possible as well in the volatile tetroxide ...
The first one was Extra Credits: Firefall, which spanned 5 episodes and was requested by Red 5 Studios to help reinforce the game design decisions in their video game Firefall. [ 34 ] After moving to YouTube, the team decided to make use of their space to expand their channel with new series running on different days of the week.
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