24-year-old Harry Daghlian was irradiated as a result of a criticality accident that occurred when he dropped a tungsten carbide brick onto a 6.2 kg plutonium–gallium alloy bomb core. This core ...

In 1945, alone in his laboratory, physicist Harry Daghlian was performing a neutron reflector experiment on the demon core when he mistakenly dropped a brick of reflective tungsten carbide onto ...

Like Harry Daghlian ... people in the room at the time of the incident also died of radiation-induced illnesses at various points after the accident. Amazingly, the demon core was slated for ...

The scientists — Harry Daghlian and Louis Slotin — were among those experimenting on the spherical 14-pound mass of plutonium, which wouldn't start a dangerous nuclear chain reaction on its own.

The Demon Core (Credit: Los Alamos National Laboratory) (via WikimediaCommons). That afternoon Daghlian constructed another cube 12 ¾” around the same "49 Metal." After completing the fifth ...

The demon core never actually made it into a nuclear weapon. Following the Slotin accident, it was melted down and its elements were redistributed across several new warheads.

A replica of what the Demon Core would have looked like at the time of the accident. (Credit: Los Alamos National Laboratory/Wikimedia Commons) At the Los Alamos National Laboratory in New Mexico, ...

Ever heard of The Demon Core? ... by a gifted 24-year-old physicist named Harry Daghlian. ... especially for what was thought to be a freak accident. So a year later, Daghlian’s friend, ...

The demon core of plutonium claimed numerous lives at Los Alamos due to sloppy science. By Sebastian Anthony August 20, 2014 Share on Facebook (opens in a new window) ...

The Manhattan Project that built the atomic bomb wasn't without its own dangers. Experiments on a so-called "demon core" of plutonium caused the deaths of two Manhattan Project physicists. Both ...