Californium does not occur naturally on Earth. The process to create it is as lengthy as it is expensive, making this synthetic element far more costly ... Continue Reading → ...

Californium, a metal first synthesized in 1950, is the world's most expensive material due to its extreme rarity and its ...

But here's the catch: the calcium-48 beams (Z=20), which until now were the basis of this process, have reached their limit when bombarding californium targets, the heaviest that can be produced.

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