Development of nuclear decay data for radiation dosimetry calculation

JAEA and ORNL have jointly developed a nuclear decay database for 1037 radionuclides, which are significant in medical, environmental and occupational exposures. The scheme for the development consisted of the following procedures. (1) Consistency of nuclear structure data file, ENSDF, used as input to compile the decay data was examined by referring to the latest nuclear parameters and by comparing computed energies of radiations with total decay energies. (2) The computer code EDISTR04 was developed and adopted for calculating energies and intensities of atomic radiations and spontaneous fission radiations using updated atomic data and computation methods. (3) Quality assurance of the compiled data was undertaken by comparisons with experimental data and other evaluated libraries. A package of the data files, DECDC2, will succeed the MIRD monograph and ICRP Publication 38 and will be extensively used in dose calculation in various applications. (author)