Subcritical mass of plutonium used in the Manhattan Project
A re-creation of the experiment involved in the 1945 incident. The sphere of plutonium is surrounded by tungsten carbide blocks acting as neutron reflectors.
The demon core was a sphere of plutonium that was involved in two fatal radiation accidents when scientists tested it as a fissile core of an early atomic bomb. It was manufactured by the Manhattan Project, the U.S. nuclear weapon development effort during World War II. It was a subcritical mass that weighed 6.2 kilograms (14 lb) and was 8.9 centimeters (3.5 in) in diameter.
The core was prepared for shipment to the Pacific Theater as part of the third nuclear weapon to be dropped on Japan, but when Japan surrendered, the core was retained for testing and potential later use in the case of another conflict.
The two criticality accidents occurred at the Los Alamos Laboratory in New Mexico on August 21, 1945, and May 21, 1946. In both cases, an experiment was intended to demonstrate how close the core was to criticality with a tamper (layer of dense material surrounding the fissile material), but the core was accidentally put into a critical configuration. Physicists Harry Daghlian, in the first accident, and Louis Slotin, in the second, suffered acute radiation syndrome (ARS) and died soon afterward, while others present in the laboratory were also exposed. The core was melted down during the summer of 1946 and the material recycled for use in other cores.
The demoncore was a sphere of plutonium that was involved in two fatal radiation accidents when scientists tested it as a fissile core of an early atomic...
Originally nicknamed "Rufus", the core became known as the demoncore following two successive lethal criticality accidents. The core was melted down in summer...
Daghlian, who had been fatally exposed to radiation by the same plutonium "demoncore" that killed Slotin. Slotin was hailed as a hero by the United States...
carbide brick onto a 6.2 kg bomb core made of plutonium–gallium alloy. This core, subsequently nicknamed the "demoncore", was later involved in the death...
[better source needed] Such an effect was exhibited twice in accidents involving the DemonCore, a subcritical plutonium pit that went critical in two separate fatal...
1945 experiment A re-creation of the Slotin incident. The plutonium "demoncore" (the same as in the Daghlian incident) was inside at the time of the...
After the death of Daghlian and Slotin, the mass became known as the "demoncore". It was ultimately used to construct a bomb for use on the Nevada Test...
Laboratory in New Mexico with same plutonium bomb core as the Daghlian accident, known as the "demoncore". 1 Harry Daghlian 1945, August 21 Criticality...
Daghlian. Both incidents occurred with the same plutonium core, which became known as the demoncore. Even before Oppenheimer was chosen to be the lead scientist...
Rocky Flats Plant Techa River Pollution of Lake Karachay 1945 and 1946 Demoncore 1942 Leipzig L-IV experiment accident Nuclear fallout Nuclear and radiation...
The Neon Demon is a 2016 psychological horror film directed by Nicolas Winding Refn, co-written by Mary Laws, Polly Stenham, and Refn, and starring Elle...
reaction during an accident with what later obtained the nickname the demoncore. He received a dose of 5.1 Sv, or 3.1 Gy. He died 16 days after this photo...
reactivity. In a bomb, a dense shell of material surrounding the fissile core will contain, via inertia, the expanding fissioning material, which increases...
dropped a tungsten carbide brick onto a plutonium sphere, known as the demoncore, causing the subcritical mass to go supercritical with the reflected neutrons...
accident involving a beryllium reflector and the same plutonium core (the so-called "demoncore") that had previously claimed the life of Daghlian. In December...
implausibly attempting to build an atomic bomb, was based on the real DemonCore accident involving U.S. scientist Harry Daghlian in 1945. Some of the...
Harry Daghlian and Louis Slotin in criticality accidents involving the demoncore. On 10 March 1945, a Japanese fire balloon struck a power line, and the...
radiation-related. Slotin worked with the same bomb core as Daghlian which became known as the "demoncore." It was later melted down and combined with existing...
As with the two Los Alamos criticality accidents involving the earlier demoncore, victims who were close enough to receive a lethal dose died, while those...
away from the tennis grass courts at Wimbledon the demoncore, the plutonium nuclear weapon core that was involved in two deadly nuclear accidents, was...
infamous plutonium mass used in the experiment was referred to as the demoncore. Lost source accidents, also referred to as orphan sources, are incidents...
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