Background study of absorbed dose in biological experiments at the Modane Underground Laboratory
Language
en
Communication dans un congrès
This item was published in
EPJ Web Conf., EPJ Web Conf., 2015-11-09, Bordeaux. 2016, vol. 124, p. 00006
English Abstract
Aiming to explore how biological systems respond to ultra-low background environ-ments, we report here our background studies for biological experiments in the Modane Under-ground Laboratory. We find that the minimum ...Read more >
Aiming to explore how biological systems respond to ultra-low background environ-ments, we report here our background studies for biological experiments in the Modane Under-ground Laboratory. We find that the minimum radioactive background for biology experiments is limited by the potassium content of the biological sample itself, coming from its nutritive me-dium, which we find in our experimental set-up to be 26 nGy hr-1. Compared to our reference radiation environment in Clermont-Ferrand, biological experiments can be conducted in the Modane laboratory with a radiation background 8.2 times lower than the reference above-ground level. As the radiation background may be further reduced by using different nutritive media, we also provide measurements of the potassium concentration by gamma spectroscopy of yeast extract (63.3±1.2 mg g-1) and tryptone (2.5±0.2 mg g-1) in order to guide media selection in future experiments.Read less <
Origin
Hal imported