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Controlled experiments reveal how nuclear fallout particles form
- May 23, 2026 at 8:00 PM
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In less than a millionth of a second after a nuclear detonation or a severe nuclear reactor accident, an enormous burst of energy heats the surrounding air and materials. Everything in the vicinity is vaporized into a hot, glowing cloud of gas and plasma. As that nuclear fireball expands, it mixes with air, begins to cool and condenses into tiny solid particles—creating nuclear fallout.
Originally published at Phys.org