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Geiger counters are so last summer. Lasers can detect radioactive material too, y'know

Yet Another Anonymous coward Silver badge

No they are, for radioactive particles, going quite slowly.

A beta emmitter (a single fast elecron) is like driving an F1 car into the crowd, you get a long way but only hit a few people in the path.

An alpha particle is like driving an 8000ton bulldozer into the crowd

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