Harry K. Daghlian Jr.
Haroutune Krikor Daghlian, Jr. (May 4, 1921 – September 15, 1945) was an Armenian American physicist with the Manhattan Project who accidentally irradiated himself on August 21, 1945, during a critical mass experiment at the remote Omega Site facility at Los Alamos National Laboratory in New Mexico, resulting in his death 25 days later.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 delta phase plutonium bomb core. This core, available at the close of World War II and later nicknamed the "demon core", also resulted in the death of Louis Slotin in a similar accident, and was used in the Able detonation, during the Crossroads series of nuclear weapon testing.
Personal facts
| Alias (AKA) | Daghlian Haroutune Krikor Jr. (full name) |
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| Birth date | May 04, 1921 |
| Birth name | Haroutune Krikor Daghlian Jr. |
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| Date of death | September 15, 1945 |
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