Radiation Risk and Ethics

Jaworowski, Zbigniew

doi:10.1063/1.882810

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Radiation Risk and Ethics

Author(s): Zbigniew Jaworowski

Publication date Created: September 1999

Publication date (Print): September 1999

Journal: Physics Today

Publisher: AIP Publishing

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Influence on cell proliferation of background radiation or exposure to very low, chronic gamma radiation.

H Planel, J P Soleilhavoup, R Tixador … (1987)

Investigations carried out on the protozoan Paramecium tetraurelia and the cyanobacteria Synechococcus lividus, which were shielded against background radiation or exposed to very low doses of gamma radiation, demonstrated that radiation can stimulate the proliferation of these two single-cell organisms. Radiation hormesis depends on internal factors (age of starting cells) and external factors (lighting conditions). The stimulatory effect occurred only in a limited range of doses and disappeared for dose rates higher than 50 mGy/y.