Compilation of New Nuclear Decay Data Files Used for Dose Calculation

Abstract

Comprehensive nuclear decay data files used for dose calculation have been compiled using decay data sets from the Evaluated Nuclear Structure Data File (ENSDF), the latest version in August 1997. The compiled data files contain the decay data for (1) 817 radionuclides that are listed in ICRP Publication 38 (Publ. 38) and 6 additional isomers and (2) 162 radionuclides with half-lives ≥10 min that are not listed in Publ. 38 and their 28 daughters. For all of the decay data sets used as input, basic nuclear properties that are particularly important for calculating energies and intensities of emissions were examined and updated by referring to NUBASE. In addition, possible revisions of partial and incomplete decay data sets were done for their format and syntax errors, level schemes, normalization records, and so on. After that, the decay data sets were processed by EDISTR in order to compute the energies and intensities of α particles, β particles, γ rays, internal conversion electrons, X rays, and Auger electrons emitted in nuclear transformation. The compiled data were prepared in two different types of format, Publ. 38 and NUCDECAY formats, which have been used as standard forms in dose calculation in radiation protection. The compiled data will be widely used for external and internal dose calculations and will be beneficial to a future revision of ICRP Publ. 38.

The Impact of Positron Range on PET Resolution, Evaluated with Phantoms and PHITS Monte Carlo Simulations for Conventional and Non-conventional Radionuclides

“…Moreover, we provide PET images of Jaszczak phantoms filled with solutions of each radionuclide, acquired on a benchmark preclinical PET scanner (Siemens® Inveon™ micro-PET/CT) for comparison and validation of the preclinical simulations and for comparison with previous phantom imaging experiments [10,11]. A summary of relevant properties for each of the radionuclides examined is provided in Table 1; the positron emission energy spectrum for each radionuclide, obtained from the DECDC nuclear decay database [17], is provided in Fig. 1.…”