Harry Daghlian

Harry Daghlian
Daghlian c. 1944
Born	Haroutune Krikor Daghlian Jr. (1921-05-04)May 4, 1921 Waterbury, Connecticut, U.S.
Died	September 15, 1945(1945-09-15) (aged 24) Los Alamos, New Mexico, U.S.
Cause of death	Acute radiation syndrome
Resting place	Cedar Grove Cemetery
Education	Massachusetts Institute of Technology Purdue University (BS)
Occupation	Physicist

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 New Mexico and died 25 days later from the resultant 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 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.