Sentence examples for a fissile core from inspiring English sources

The first design, proposed by Sakharov in 1948, consisted of alternating layers of deuterium and uranium-238 between a fissile core and a surrounding chemical high explosive.

The fabrication of pits, along with the manufacture of the dense beryllium tamper and reflector layers that surround a fissile core, was subsequently relocated to the Los Alamos National Laboratory in New Mexico, one of the two laboratories in the United States where nuclear weapons are designed (the other is the Lawrence Livermore National Laboratory in California).

In September 1943, mathematician John von Neumann had proposed a design in which a fissile core would be surrounded by two different high explosives that produced shock waves of different speeds.

The first, at Los Alamos, is an oversized X-ray machine that uses non-fissile material to examine what happens when a pit the fissile core of a nuclear weapon implodes.

In the simplest design, a spherical fissile core is surrounded by a reflector (also known as a tamper), which in turn is surrounded by the chemical high explosive.

In December 1950 Ulam had proposed a new fission weapon design, using the mechanical shock of an ordinary fission bomb to compress to a very high density a second fissile core.

Thus, a spherical fissile core has the fewest escaping neutrons per unit of material, and this compact shape results in the smallest critical mass, all else being equal.

A nuclear chain reaction, whether in a reactor or an exploding bomb, comes about when the splitting of a "fissile" nucleus by a neutron produces neutrons that will go on to split further fissile nuclei.

Yet it is openly working on missiles that could deliver one and on the techniques that could produce sufficiently enriched uranium or else plutonium for a weapon's fissile core.

The report concluded that there was no missing bomb, and that the American underwater operation was a search for the uranium-235 of the fissile core of a secondary.

In particular, he questions the agency's focus on a bus-sized steel vessel supposedly installed in an Iranian military site at Parchin in 2000, which the November report said was for "hydrodynamic experiments" – testing shaped, high-explosive arrays used to implode the spherical fissile core of a warhead and start a chain reaction.