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Haroutune Krikor Daghlian Jr. (May 4, 1921 – September 15, 1945) was an American physicist with the Manhattan Project, which designed and produced the atomic bombs that were used in World War II. He accidentally irradiated himself on August 21, 1945, during a critical mass experiment at the remote Omega Site of the Los Alamos Laboratory in ...
Scientist Harry Daghlian suffered fatal radiation poisoning and died 25 days later after accidentally dropping a tungsten carbide brick onto a sphere of plutonium, which was later (see next entry) nicknamed the demon core. The brick acted as a neutron reflector, bringing the mass to criticality. This was the first known criticality accident ...
Harry Daghlian dropped a tungsten carbide brick onto a plutonium core, inadvertently creating a critical mass at the Los Alamos Omega site. He quickly removed the brick, but was fatally irradiated, and died on September 15. [5] May 21, 1946 Los Alamos National Laboratory, Los Alamos, New Mexico, United States
Harry Daghlian: 3.1 Gy [19] Harry Daghlian criticality accident: Death in 25 days May 21, 1946 Louis Slotin: 11 Gy [63] Slotin criticality accident: Death in 9 days Alvin C. Graves: 1.9 Gy [19] Death in 19 years December 30, 1958 Cecil Kelley: 36 Gy [64] Cecil Kelley criticality accident: Death in 38 hours July 24, 1964 Robert Peabody ~100 Gy ...
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
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
Contrary to Merriman's death in the movie, Slotin's accident and death occurred after the dropping of the two bombs on Japan, and his early death was feared by some as karma after the event. [4] A very similar mishap happened less than two weeks after the Nagasaki bomb, claiming the life of Harry Daghlian.
August 21, 1945 – Harry Daghlian died at Los Alamos National Laboratory in New Mexico. May 21, 1946 – Louis Slotin died. December 30, 1958 – Cecil Kelley criticality accident, at the Los Alamos National Laboratory. [27] 1961 – SL-1 accident resulted in three fatalities. 1964- Wood River Jct. Rhode Island.
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