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Aa consequence of a fall-out, two radioactive beta emitting isotopes are released. Tritium, with a physical...

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Physics

  1. Aa consequence of a fall-out, two radioactive beta emittingisotopes are released. Tritium, with a physical half-life time of12 years and an average beta energy of 6keV, and137Cs,with 30 years half-life time and an electron with average energy of170 keV (we neglect the also emitted high energy y-ray here)

    1. a) A human of 100Kg ingests 107 Bq of tritium and 103Bq of 137Cs. No additional activity is taken inafterwards. What is the whole body dose from each isotope the humanreceives over the first 1 day? Assume here that all the activitystays constant in the body over the day.

    2. b) One year after the incident, what is the dose over the yearfrom the given ingested activity from each isotope? Assume tritiumhas 10 days and Caesium15 years of biological half-life time in thehuman body.

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