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Z<br />

Uran-radium serien<br />

d l f 222 – dannelse af R 222Rn 226 Ra<br />

T 1/2 = 1600 a<br />

222 Rn<br />

T 1/2 = 3.82 d<br />

2013 N<br />

Isotopteknik, F04 (JG) 37

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