U238 or U-238 may be: German submarine U-238, a German World War II U-boat (submarine) Uranium-238 (U-238 or 238U), the most common isotope of uranium...

The Gilbert U-238 Atomic Energy Lab is a toy lab set designed to allow children to create and watch nuclear and chemical reactions using radioactive material...

German submarine U-238 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine built for service in the Second World War. She was laid down on 21 April...

Uranium-238 (238 U or U-238) is the most common isotope of uranium found in nature, with a relative abundance of 99%. Unlike uranium-235, it is non-fissile...

is stable): U 238 ⟶ Th 234 ⏟ daughter   of   238 U ⟶ Pa 234 m ⏟ granddaughter   of   238 U ⟶ ⋯ ⟶ Pb 206 ⏞ decay   products   of   238 U {\displaystyle...

at zero): 234 U / 238 U = 1 + A × 2 − t / 245000 {\displaystyle ^{234}{\text{U}}/^{238}{\text{U}}=1+A\times 2^{-t/245000}} 230 Th / 238 U = 1 + A 1 − 75000...

Surrounded by a U-238 reflector/tamper, the Fat Man's pit was brought close to critical mass by the neutron-reflecting properties of the U-238. During detonation...

of proliferation). Fissile U-235 and non-fissile but fissionable and fertile U-238 are both used in the fission process. U-235 is fissionable by thermal...

only moderately enriched with U-235 relative to U-238, so the U-238 continues to serve as a denaturation agent for any U-235 produced by plutonium decay...

uranium with U-235 levels usually above 90%, suitable for nuclear weapons. The uranium in yellowcake is almost exclusively (>99%) U-238, with very low...

primarily of the unconsumed remains of the original fuel (typically U-235, U-238, and/or Pu-239). The fuel is first dissolved in nitric acid at a concentration...

Plutonium-238 (238 Pu or Pu-238) is a radioactive isotope of plutonium that has a half-life of 87.7 years. Plutonium-238 is a very powerful alpha emitter;...

cause subsequent fission of 238 U , so fission of 238 U does not sustain a nuclear chain reaction. Fast fission of 238 U in the secondary stage of a thermonuclear...

primarily of two isotopes U-238 and U-235, with 99.28% of the metal being U-238 while 0.71% is U-235, and the remaining 0.01% is mostly U-234. The number in...

age of the Earth. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99% of uranium on Earth) and...

generate much, or even most, of their yields from fission. Although the U-238 isotope of uranium will not sustain a chain reaction, it still fissions...

is U-238, while approximately 0.72% is U-235, fissile by thermal neutrons, and the remaining 0.0055% is U-234. If natural uranium is enriched to 3% U-235...

Initially only about 0.7% of it is fissile U-235, with the rest being almost entirely uranium-238 (U-238). They are separated by their differing masses...

(radioelement) with no stable isotopes. It has two primordial isotopes, uranium-238 and uranium-235, that have long half-lives and are found in appreciable quantity...

isotopes: uranium-238 (U-238), accounting for 99.3% and uranium-235 (U-235) accounting for about 0.7%. U-238 has 146 neutrons and U-235 has 143 neutrons...

was powered by two AEG GU 460/8-276 (except in U-45, U-46, U-49, U-51, U-52, U-54, U-73 to U-76, U-99 and U-100, which retained the BBC motor of the VIIA)...

compared to uranium that is composed of 99.3% fertile U-238 and 0.7% more valuable fissile U-235. Less suitable for bombs. It is difficult to make a...

(primarily as a product of alpha decay of 238 U—because the half-life of 238 U is much larger than that of 234 U, it is be produced and destroyed at the...

carrier and used highly enriched uranium (93% U-235) as "seed" fuel surrounded by a "blanket" of natural U-238, in a so-called seed-and-blanket design; in...

uranium enrichment, relying on the slight mass difference between atoms of U-238 and U-235 in uranium hexafluoride gas. In a liquid suspension, many particles...

fuels are U-233, U-235 and Pu-239. The second type of fuel is called fertile. Examples of fertile fuel are Th-232 (mined thorium) and U-238 (mined uranium)...

German submarine U-995 is a Type VIIC/41 U-boat of Nazi Germany's Kriegsmarine. She was laid down on 25 November 1942 by Blohm & Voss in Hamburg, Germany...

is dependent upon the alpha decay energy. A pleochroic halo formed from U-238 has theoretically eight concentric rings, with five actually distinguishable...

German submarine U-331 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II, famous for sinking the battleship HMS Barham. The submarine...

industry that refers to the isotopes of plutonium (239 Pu) uranium (235 U, 238 U) and thorium (232 Th) present in nuclear fuel, as opposed to the minor...