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Radioaktive Pr¨aparate im Projektlabor · Sr 2.2801 MeV 100 %, aus 90 39 Y Wichtigste γ-Energien γ-Emission nur 10−4 der β-Emission 28.79 a b-Sr 0.5460 MeV 90 38 64.00 h Y 90
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