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Alexeï Navalny a bien été empoisonné, mais pas Yasser Arafat. Qu’on se le dise !

lundi 24 août 2020, par do (Date de rédaction antérieure : 24 août 2020).

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  • Alexeï Navalny a bien été empoisonné, mais pas Yasser Arafat. Qu’on se le dise ! 24 août 2020 23:19

    Concernant Yasser Arafat, voici la conclusion du labo suisse qui a procédé aux analyses d’échantillons. NB : Y.A. avait pour pseudo Mr. Louvet.
    Document introuvable sur le net.

    Conclusions
    All the belongings of Mr Louvet were first measured with surface contamination monitors and HPGe
    gamma spectrometry. We observed no significant activities.
    We then evaluated a potential contamination by a lethal quantity of polonium-210 (210
    Po). Because
    of the long time between the death (2004) and the present measurements(2012), the potential
    quantity of
    210
    Po in Mr Louvet’s belonging had decreased bya factor of one million (20 radioactive
    half-lives). We considered the values of the literature and ran our own biokinetic and urinary
    excretion model. We concluded that, even in case of a poisoning similar to the Litvinenko case, only
    traces of the order of few mBq (one decay every 1,000 seconds) were expected to be found in year
    2012.
    We therefore chose to conduct 210
    Po measurements on samples that had been manifestly worn by Mr 
    Louvet and where stains of residual biological liquids could be suspected by direct eye observation.
    Some of these samples show
    210
    Po activities that are clearly above the values measured on other
    samples that had either not been worn or that were not containing visible suspect stains.
    This observation alone is however not sufficient to draw a final conclusion because out of the 10
    measurements performed on local samples totally unrelated with Mr Louvet’s belonging, two show
    210
    Po activities above the value of2 mBq/g, which can be set as a limit for background value.
    To clarify the origin of the measured
    210
    Po, we should take into account that this nuclide is naturally
    present in the environment as a decay product coming from lead-210 (
    210
    Pb) :
    210
    Po is said to be
    supported by
    210
    Pb. Therefore, we propose to wait until the beginning of June 2012 and measure the
    samples again. If we observe a significant amount of
    210
    Po in the samples with high activities in the
    first measurements, this would show that
    210
    Po is supported by
    210
    Pb. This would therefore be a very
    strong argument in favor of a natural origin of the observed
    210
    Po, although such a quantity would be
    very uncommon. Alternatively, if we do notmeasure a significant amount of
    210
    Po, we should
    conclude that the high activity measured the first time does not come from the
    210
    Pb decay and
    therefore is not explainable by a known natural phenomenon.
    Finally, and in addition to our alpha-spectrometric analysis, we re-analyzed the raw data of the
    gamma spectrometry performed on urine samples bythe French government before Mr Louvet’s
    death. We did not detect any abnormal gamma activities. In particular, we checked the area around
    the energy 803 keV that is (weakly) emitted by
    210
    Po. We did not find any evidence of this nuclide in
    the spectra.

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