Model for calculating energy absorption in environmental objects from incorporated sources of monoenergetic electrons

Model is suggested to calculating energy absorption in organisms of various geometry from in-corporated sources of monoenergetic electrons. The effectiveness of the approach was demon-strated for spheres, ellipsoids, and cylinders by comparison of analytical values with large inter-national testing data. Model equations are free of any fitting parameters; computer approximating procedures are not employed. The method allows to make correct express-calculations of inter-nal absorbed doses in various biological objects from beta emitting radionuclides; the calcula-tions are performed without Monte Carlo codes. The model may be used in the internal radiation dosimetry for non-human biota, and in environmental radiation protection.