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Published on: September 1, 2017
Determination of 129I in atmospheric samples by accelerator mass spectrometry
J M López-Gutiérrez1, M García-León, C Schnabel
1Departamento de Física Atómica, Molecular y Nuclear, Universidad de Sevilla, Spain. lguti@cica.es
Abstract:
A method for the radiochemical extraction of 129I from atmospheric charcoal filters and its measurement by accelerator mass spectrometry is presented. Either the 129I concentration or the 129I/127I atom ratio can be determined in the sample. With this method, air filters from Seville, in the Southwest of Spain (37.4 degrees N, 6 degrees W) have been analyzed. Sensitivities in the order of 10(4) atoms/m3 for 129I concentrations and 10(-10) for 129I/127I atom ratios are obtained. AMS measurements are performed with the 6 MV tandem accelerator at the ETH-Hönggerberg in Zurich.
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