First results on U-236 levels in global fallout

Autor(en)

Aya Sakaguchi, K. Kawai, Peter Steier, Francesca Quinto, K Mino, J Tomita, Masaharu Hoshi, N Whitehead, Masayoshi Yamamoto

Abstrakt

The global fallout 236U level in soil was deduced from measurements of 236U, 239+240Pu and 137Cs in surface soils which are solely influenced by global fallout. A total of 12 soil cores from the depths of 0–10, 0–20 and 0–30 cm were collected at a flat forest area in Japan. Concentrations of 239+240Pu and 238U were determined by ?-particle spectrometry, while the 236U/238U ratio was measured with accelerator mass spectrometry (AMS). Consistent 236U/239Pu ratios between 0.212 and 0.253 were found. Using this ratio, the total global fallout of 236U on the earth is estimated to be as much as ca. 900 kg. This knowledge will contribute to the promotion of research on U isotopes, including 236U, for the fields of geo-resources, waste management and geochemistry.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

Hiroshima University, Kanazawa University, Universität Wien

Journal

Science of the Total Environment

Band

407

Seiten

4238-4242

Anzahl der Seiten

5

ISSN

0048-9697

DOI

https://doi.org/10.1016/j.scitotenv.2009.01.058

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/first-results-on-u236-levels-in-global-fallout(885b40ea-43e2-430b-a322-37b0c6a351d7).html