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The ecological half-life of Cs-137 in undisturbed silt soil

Autor(en)

Manfred Drosg

Abstrakt

The time necessary to safely cultivate agricultural areas after they

have been contaminated by radioactivity (e.g. after the Chernobyl

accident) is not determined by the physical half-life of the radioactive

isotopes in question but by their (usually much shorter) ecological

half-life (Brisbin et al., 2002).

This half-life not only depends on the type of soil but also on whether

the soil was fertilized or not. Therefore it is not possible to

determine an ecological half-life that is universally valid. However,

the value for undisturbed, unfertilized soil should provide a general

indication for the duration of ecological half-life. In a silt soil in

Vienna, Austria, the ecological half-life of ¹³⁷Cs was determined to be 0.8 years, which is much shorter than the physical half-life of 30 years.

Organisation(en)

Aerosolphysik und Umweltphysik

Journal

Applied Radiation and Isotopes

Band

Seiten

1464-1466

Anzahl der Seiten

ISSN

0969-8043

DOI

https://doi.org/10.1016/j.apradiso.2012.04.024

Publikationsdatum

2012

Peer-reviewed

ÖFOS 2012

103005 Atomphysik

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