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The demon core (like the core used in the bombing of Nagasaki) was, when assembled, a solid 6.2-kilogram (14 lb) sphere measuring 8.9 centimeters (3.5 in) in diameter.. It consisted of three parts made of plutonium-gallium: two hemispheres and an anti-jet ring, designed to keep neutron flux from "jetting" out of the joined surface between the hemispheres during implosi
Daghlian was irradiated as a result of a criticality accident that occurred when he accidentally dropped a tungsten carbide brick onto a 6.2 kg bomb core made of plutonium–gallium alloy. This core, subsequently nicknamed the "demon core", was later involved in the death of another physicist, Louis Slotin.
Criticality accident at Los Alamos National Laboratory in New Mexico with same plutonium bomb core as the Daghlian accident, known as the "demon core". 1 Harry Daghlian: 1945, August 21 Criticality accident at Los Alamos National Laboratory in New Mexico with a plutonium bomb core, known as the "demon core". 1 Cecil Kelley criticality accident
Louis Alexander Slotin (/ ˈ s l oʊ t ɪ n / SLOHT-in; [1] 1 December 1910 – 30 May 1946) was a Canadian physicist and chemist who took part in the Manhattan Project.Born and raised in the North End of Winnipeg, Manitoba, Slotin earned both his Bachelor of Science and Master of Science degrees from the University of Manitoba, before obtaining his doctorate in physical chemistry at King's ...
The demon core was melted down and the material was reused in other bomb tests in subsequent years. [10] 8: 1 [11] [12] 16 June 1958: Oak Ridge, Tennessee: The first recorded uranium-processing–related criticality occurred at the Y-12 Plant. During a routine leak test a fissile solution was unknowingly allowed to collect in a 55-gallon drum.
The 35-year-old Canadian physicist and Manhattan Project scientist died as the result of an accident while performing an experiment called "tickling the dragon's tail" with a plutonium core which came to be known as the "demon core". His screwdriver slipped, exposing him to a fatal dose of radiation.
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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.