129I in rainwater along Argentina

Dr.  Andres Arazi1, Dr.  Jorge Fernandez Niello1, Prof.  Leslie Keith Fifield2, Dr.  Michaela Froehlich2, Dr.  Stefan Pavetich2, Dr.  Steve Tims2, Prof.  Anton Wallner2

1Laboratorio Tandar, Comision Nacional de Energia Atomica, , Argentina, 2Research School of Physics, Australian National University, Canberra, Australia

Iodine-129 is a fission product of uranium and hence has a pre-anthropogenic background as well as also being produced and released by atmospheric nuclear weapon tests. However, the major contributors to its inventory are nuclear fuel reprocessing plants in the Northern Hemisphere. In this work we present concentration measurements of 127I and 129I in rainwater samples from several stations along Argentina (latitudes between 25° S and 55° S) for studying the distribution patterns and potential sources of 129I in the Southern Hemisphere. Measured 129I levels, clearly above natural background and nuclear weapon tests, can be explained by the injection of 129I discharged from nuclear fuel reprocessing plants in the Northern Hemisphere into the Southern Hemisphere.


Biography:

DAAD scholarship in Technical University of Munich (2000-2002)
PhD. at University of Buenos Aires in 2003
Since 2006
Staff member at Atomic Energy National Commission of Argentina
Independent researcher at National Scientific and Technical Research Council of Argentina

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Date

Nov 17 2021

Time

WEDNESDAY
8:45 am - 9:30 am