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  2. Demon core - Wikipedia

    en.wikipedia.org/wiki/Demon_core

    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

  3. Harry Daghlian - Wikipedia

    en.wikipedia.org/wiki/Harry_Daghlian

    Louis Slotin, a colleague of Daghlian's, was killed in 1946 while performing criticality tests on the same plutonium core. [6] After these two incidents it became known as the " demon core ", [ 11 ] and all similar criticality experiments were halted until remote-controlled assembly devices were more fully developed and available.

  4. Pit (nuclear weapon) - Wikipedia

    en.wikipedia.org/wiki/Pit_(nuclear_weapon)

    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.

  5. List of military nuclear accidents - Wikipedia

    en.wikipedia.org/wiki/List_of_military_nuclear...

    The incident released the bomber's two Mark 39 nuclear bombs. Three of the four arming devices on one of the bombs activated, causing it to carry out many of the steps needed to arm itself, such as the charging of the firing capacitors and, critically, the deployment of a 100-foot (30 m) diameter retardation parachute .

  6. Criticality accident - Wikipedia

    en.wikipedia.org/wiki/Criticality_accident

    Criticality accidents are divided into one of two categories: Process accidents, where controls in place to prevent any criticality are breached;; Reactor accidents, which occur due to operator errors or other unintended events (e.g., during maintenance or fuel loading) in locations intended to achieve or approach criticality, such as nuclear power plants, nuclear reactors, and nuclear ...

  7. Talk:Demon core - Wikipedia

    en.wikipedia.org/wiki/Talk:Demon_core

    The "demon core" WAS a WW II bomb core, as demonstrated by its very existence for the Daghlian accident Aug 21, 1945, at a time when the US only possessed about two cores and perhaps only one (they were using them as fast as they were making them, and Rhodes says this was about one every month at the time of Nagasaki).

  8. Bodycam video reveals chaotic scene of deputy fatally ...

    www.aol.com/news/officials-release-video-officer...

    Body camera video released Monday by a prosecutor reveals a chaotic scene in which Sonya Massey, a Black woman who called 911 for help is shot in the face in her home by a white sheriff’s deputy.

  9. Louis Slotin - Wikipedia

    en.wikipedia.org/wiki/Louis_Slotin

    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 ...