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The plutonium used was provided to the United States under the 1958 US–UK Mutual Defence Agreement. Its isotopic composition has not been disclosed, other than the description reactor grade , and it has not been disclosed which definition was used in describing the material this way. [ 28 ]
The pits of the first nuclear weapons were solid, with an urchin neutron initiator in their center. The Gadget and Fat Man used pits made of 6.2 kg of solid hot pressed plutonium-gallium alloy (at 400 °C and 200 MPa in steel dies – 750 °F and 29,000 psi) half-spheres of 9.2 cm (3.6 in) diameter, with a 2.5 cm (1 in) internal cavity for the initiator.
[3] [9] The range of pepper heat reflected by a Scoville score is from 500 or less (sweet peppers) to over 2.6 million (Pepper X) (table below; Scoville scales for individual chili peppers are in the respective linked article). Some peppers such as the Guntur chilli and Rocoto are excluded from
Letters to the editor on the history of plutonium, Project 2025, ageism on ... and Prevention Franklin County has an average of 38.6 infections per 100,000 and Benton County has an average of 28.9 ...
The machine will be housed 1,000 feet underground at the Nevada National Security Site, formerly known as the Nevada Test Site, and will have a 400-foot-long accelerator, made up of 102 cells ...
Plutonium–gallium alloy (Pu–Ga) is an alloy of plutonium and gallium, used in nuclear weapon pits, the component of a nuclear weapon where the fission chain reaction is started. This alloy was developed during the Manhattan Project .
Pepper X rates at an average of 2.693 million Scoville Heat Units (SHU), a measure of pungency for peppers and chiles. That's hotter than law enforcement-grade pepper spray, which can reach up to ...
One of four example estimates of the plutonium (Pu-239) plume from the 1957 fire at the Rocky Flats nuclear weapons plant. The Rocky Flats Plant, a former United States nuclear weapons production facility located about 15 miles (24 km) northwest of Denver, caused radioactive (primarily plutonium, americium, and uranium) contamination within and outside its boundaries. [1]