Activity of Isotope: mCi, mR, Rem Value & Distance

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To determine the activity of an isotope using values like mCi, mR, or Rem, one must understand the relationship between these units and the specific isotope's properties. Ionization energy plays a crucial role in assessing how far radiation can travel in air and soil. The hazardous-emergency distance calculations, such as those from the Fukushima accident, involve complex models that consider the isotope's decay and exposure levels. Clarifying the question can lead to more precise guidance on these calculations. Understanding these concepts is essential for evaluating radiation safety and exposure risks.
exradioa
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Hi all,

how can I find the activity of isotope which it has in area given value mCi or mR or Rem value of this? ionization energy of isotope how many distance can it travel on air and in earth-ground when I know only the Curi or Rem or Roengen?

ex. Who they calculate the hazardous-emergency distance from Fukushima accident?
 
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If you rephrased your question so it was more clear, perhaps we could help.
 

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