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Physikalisch-Technische Bundesanstalt (PTB) Bundesallee 100 38116 Braunschweig, Germany http://www.ptb.de
Contact Ms Imke Frischmuth +49 531 5929323
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Physikalisch-Technische Bundesanstalt (PTB)

50 Jahre Spurensuche

Seit Oktober 1963 misst die PTB kleinste Mengen radioaktiver Stoffe in der Luft - ein Jubiläum

(PresseBox) (Braunschweig, )
Meist stammen sie aus unserer natürlichen Umwelt, manchmal aber auch aus Atomwaffentests oder Unfällen: radioaktive Stoffe in der bodennahen Luft. Seit genau 50 Jahren werden sie von der Physikalisch-Technischen Bundesanstalt (PTB) gemessen. Die Wissenschaftler können dabei äußerst geringe Spuren dieser Stoffe finden, die möglicherweise sogar in weiter Entfernung freigesetzt wurden. Mitunter führt diese "Spurensuche" zu überraschenden Quellen, beispielsweise zu einem Krematorium, in dem ein Toter eingeäschert wurde, der kurz zuvor nuklearmedizinisch mit Selen-75 behandelt worden war.

Um der Quelle radioaktiver Substanzen in der Luft auf die Spur zu kommen, benötigt man ein weit verzweigtes Netzwerk aus Messstellen sowie detaillierte Kenntnisse
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