page_title: Harry Daghlian
hierarchical_section_title: Harry Daghlian
caption_attribution_description: English: Herbert Lehr (left) and Haroutune Krikor Daghlian, Jr. (a.k.a. Harry Daghlian) (right) loading the assembled tamper plug containing the plutonium pit and initiator into a sedan for transport from the McDonald ranch house to the shot tower.
context_page_description: Haroutune Krikor Daghlian Jr. 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 New Mexico, and died 25 days later from the resulting radiation poisoning.
  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 plutonium–gallium alloy bomb core. This core, subsequently nicknamed the "demon core", was later involved in the death of another physicist, Louis Slotin.
context_section_description: Haroutune Krikor Daghlian Jr. (Armenian: Յարութիւն Գրիգոր Դաղլեան; 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 New Mexico, and died 25 days later from the resulting radiation poisoning.
  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 plutonium–gallium alloy bomb core. This core, subsequently nicknamed the "demon core", was later involved in the death of another physicist, Louis Slotin.
caption: Herbert Lehr (left) and Harry Daghlian, Jr. (right), loading the assembled tamper plug containing the plutonium pit and initiator into a sedan for transport from the McDonald ranch house to the shot tower on July 13, 1945.
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