Detailed Cross-Section of Atomic Bomb

This illustration provides a clear, simplified cross-section of a gun-type atomic bomb, a design notably used in early nuclear weapons. The diagram highlights the internal components engineered to achieve a nuclear chain reaction. At the top, a fissile projectile is depicted, ready to be propelled downwards through a barrel-like structure. Below, within the main casing, lies the larger fissile target material, along with an initiator device designed to spark the reaction upon impact. The overall design effectively shows how two subcritical masses are rapidly brought together to form a supercritical configuration, leading to an explosion.

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