Average dose to an organ per microcurie-day accumulated by a radionuclide in a source organ

The report 0RNL-50QQ (1975) was published to make the dosimetric data on internal emitters which had been compiled by the authors over a period of some five years more readily available for use 1n calculations of dose by health physicists.Users of the report will still need a retention model which will enable them to compute the uCi-days, U, accumulated 1n the various organs.However, when such a model is given the dose equivalent from source organ Y to target organ X 1s obtained as DE(X + Y) = U x S(X «-Y) (rem) where S(X «-Y) is tabulated 1n the report.The target and source organs include most of uie organs used by ICRP in specifying the annual dose limits.Generally one will require a SUIT, ot such terms over all the source organs contributing significantly to dose.In principle, the new report replaces HIRD Pamphlet No, 5 (1969) but spares the user the necessity of making detailed calculations for the many particles occurring in most decay schemes.The present report contains a complete text on the .thodologyand 1n addition has data on 60 radionuclides.A second volume 1s in preparation and will have data on 100 or more radionuclides and further volumes are planned.T he dosimetric data on photons are the results of a Monte Carlo type calculation r^Vcdon a non-homogeneous phantom having the general form of the human body but Research sponsored by the Energy Research and Development Administration under contract with Union Carbide Corporation.** Consultant.