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Detection of 133Xe in the upper troposphere over Germany released by the nuclear power plant Fukushima Daiichi

MPG-Autoren
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Rauch,  Ludwig
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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bachelor_Rauch.pdf
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Zitation

Rauch, L. (2011). Detection of 133Xe in the upper troposphere over Germany released by the nuclear power plant Fukushima Daiichi. Bachelor Thesis, Ruprecht-Karls-Universität, Heidelberg, Germany.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0012-128A-F
Zusammenfassung
After various nuclear meltdowns of the power plant Fukushima Daiichi in Japan in March 2011, large amounts of radioactive gases were released and distributed in the atmosphere. This work shows that at various altitudes and areas over Germany an increased concentration of the radioactive isotope 133Xe could be measured. This is done by a proceeding extraction of the few containing 133Xe atoms from small air samples with a highly sensitive gas chromatograph. Following this, a low background measurement of 133Xe β-decays with miniaturized proportional counters is done. The evaluation of the initial activity within the air samples is calculated by using the Maximum-Likelihood-Method. In the end a forward trajectory simulation developed by the DLR (Deutsches Zentrum für Luft und Raumfahrt) could be confirmed.