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*[[Alpha Particle|Alpha particles]] have low [[Penetration Depth|penetration depth]] but high ionizing power.
*[[Alpha Decay|Alpha decay]] is a form of [[spontaneous fission]].
*The emitted [[Alpha Particle|alpha particle]] is a [[helium]] [[Atomic Nucleus|nucleus]] (He²⁺).
*[[Alpha Decay|Alpha decay]] results in a daughter [[Atomic Nucleus|nucleus]] that is more stable than the parent.
*The [[energy]] released during [[Alpha Decay|alpha decay]] is in the range of 4-9 M[[Electron-volt|eV]].