Was the demon core hot?

Demon Core is a nickname given to a spherical core that was experimented on as a part of the Manhattan Project The core

A spherical subcritical mass of plutonium manufactured during World War II by the United States as a fissile core for an early atomic bomb

demon deals A spherical subcritical mass of plutonium manufactured during World War II by the United States as a fissile core for an early atomic bomb

demonslotgame The Demon Core On May 21, 1946 physicist Louis Slotin was conducting a dangerous experiment with a plutonium sphere