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Communication Dans Un Congrès Année : 2016

Background study of absorbed dose in biological experiments at the Modane Underground Laboratory

Résumé

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.

Dates et versions

hal-01990723 , version 1 (23-01-2019)

Identifiants

Citer

Nathanael Lampe, Pierre Marin, Jean Castor, Guillaume Warot, S. Incerti, et al.. Background study of absorbed dose in biological experiments at the Modane Underground Laboratory. 32èmes journées des Laboratoires Associés de Radiophysiques et de Dosimétrie, Nov 2015, Bordeaux, France. pp.00006, ⟨10.1051/epjconf/201612400006⟩. ⟨hal-01990723⟩
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