Le radon 222 et ses descendants à vie courte dans l'environnement atmosphérique : origine et méthodes de mesure

Charuau, J.; Labed, V.; Robé, M.C.; Thevenin, Joseph; Aubert, C.; Fazileabasse, J.; Florence, D. E.; Gibaud, C.; Heleschewitz, H.; Klein, D.; Lemaitre, Nathalie; Tymen, G.

doi:10.1051/radiopro/1996009

Cited by 5 publications

(2 citation statements)

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“…Du fait de leurs demi-vies courtes, ses descendants sont en équilibre séculaire avec lui. Son élimination conduit ainsi à leur disparition (Charuau, 1996). Il semble alors cohérent que l'activité totale corporelle d'un sous-marinier au retour de patrouille soit moins forte qu'après un séjour de quelques semaines à terre.…”

Section: Interprétation Et Discussionunclassified

Une moindre exposition des sous-mariniers au rayonnement naturel

Delhomme¹,

Bar²,

Borgne³

et al. 2010

Radioprotection

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RÉSUMÉLes spectres d'anthroporadiamétrie des sous-mariniers français embarqués sur sous-marins nucléaires lanceurs d'engins (SNLE) mettent en évidence une activité corporelle globale plus faible au retour de patrouille que lorsqu'ils sont à terre. Cette différence s'explique par l'absence de radon à bord des sous-marins après plusieurs jours de patrouille. Cette absence de radon conduit à une diminution de l'exposition des sous-mariniers à la principale source de rayonnement naturel. Par ailleurs, les conditions de plongée conduisent à une très forte atténuation des rayonnements tellurique et cosmique. En somme, les sous-mariniers embarqués sur SNLE présentent une moindre exposition aux principales sources d'exposition naturelle. Cette moindre exposition est globalement non compensée par un accroissement de l'exposition artificielle.ABSTRACT A lower exposure to natural background radiation for submariners.French submariners' whole-body counting spectra conducted in the first days following their return to naval base after a patrol on a SSBN clearly display a lower gross activity than when they are living at home. The explanation is quite simple: no source of radon exists aboard. Therefore, the naturally occurring contamination is nearly null. Furthermore, water strongly attenuates cosmic and terrestrial radiation. This leads to an underexposure of the French submariners to natural background radiation. This lack is only partially balanced by the artificial sources aboard.

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Section: Interprétation Et Discussionunclassified

Une moindre exposition des sous-mariniers au rayonnement naturel

Delhomme¹,

Bar²,

Borgne³

et al. 2010

Radioprotection

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“…-ModNat, the concept of the Natural Model of radioactivity decay by the figure 2 in [33], figure 3 in [34], and chart 2 in [35] (first sequence).…”

Section: Existing Models Of the Radioactive Decay Lawmentioning

confidence: 99%

Development and Experimentation of a New Mathematical Model for Teaching–Learning the Radioactive Decay Law

Mamane

Benjelloun

2019

Education Sciences

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Our plan is to bring professors and their Moroccan pupils to focus on the teaching–learning of physics, without adopting forced mathematical modeling in previously unknown frames and registers, as is actually the practice. The preliminary study consists of developing a new analytical model for the teaching–learning of the radioactive decay law. However, the validation study was conducted to test its pertinence. The results show that, compared to the official model, pupils are very satisfied. In fact, the proposed new model intelligibility frame facilitates the linking of the concept of space of reality, with those of registers and frames. The pupils’ performance amounted to 65.33% in the development of the analytical model of the radioactive decay law, while in terms of suitable applications, pupil performance ranged from 0% to 75%. This result is partly due to the collaborative work, which induced a very significant increase in pupil performance. They were observed between increases ranging from 33.3% to 69.5%. In fact, we attribute these good performances to the ICT resources’ mobilization, specifically SimulP200, the one that we have exclusively elaborated. These resources have also mitigated the difficulties of the experiment, and those related to the processes of elaboration of different radioactive decay law model.

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