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:<math>\mathrm{~^{22}_{11}Na}\rightarrow\mathrm{~^{22}_{10}Ne}+\mathrm{e}^++{\nu}_e</math> (β<sup>+</sup>- säteily)
Jokainen neutroni, joka ei ole sitoutunut atomiytimeen β-hajoaa noin 15 minuutin puoliintumisajalla.
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== Säteilyn luonne ==
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