[en] A computer-based system for obtaining the energies and intensities of radiations from radionuclide decays in a format suitable for application to radiation dosimetry calculations is described. The system is based on radionuclide decay data written in the format of the Evaluated Nuclear Structure Data File (ENSDF). These data are processed with the computer code MEDLIST, which produces listings of the energies and intensities of the radiations in tabular form and in a decimal, computer-readable format. Collections of radionuclide decay data which have been prepared for publication from ENSDF by the MEDLIST code and applications of these data to radiation dosimetry calculations are discussed