Average dose due to natural radioactivity deposited internally

Table
Average dose due to natural radioactivity deposited internally
isotope radioactivity
in millibecquerel (mBq)* radiation dose in mSv (per year) critical organ
carbon-14 2.2(10−7)
per kilogram beta rays 0.016 gonads
potassium-40 3.9(10−7)
per kilogram beta rays 0.165 gonads
potassium-40 5.6(10−8)
per kilogram gamma rays 0.023 gonads
radium and daughters 3.7(10−9)
in body alpha, beta, gamma rays 7.6 bones
radon and daughters 1.2(10−2)
per 1 in inhaled air alpha, beta, gamma rays 20 lungs
*Millibecquerel is a unit of radioactive disintegration rate; it corresponds to that quantity of a radioactive element in which there is one disintegration every 1,000 seconds.
See as table:

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Universalium. 2010.

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