 Alpha particles have low penetration depth

ID: alpha-particles-have-low-penetration-depth

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Alpha particles have low penetration depth by

Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16

They are stopped by:

by a few centimeters of air
a sheet of paper
the skin

Therefore, alpha emitters are not too dangerous unless ingested.

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