JEFF-3.1 Evaluated Data: radioactive decay data data

Radioactive decay data forms an integral part of the nuclear data requirements for nuclear applications. The JEFF-3.1 decay data library contains 3 852 nuclides from neutron to Rg-272. The decay data sub-group of the JEFF Project decided that a completely new start should be made in the construction of this library compared to the previous versions. The JEFF-3.1/RDD library is described in detail in JEFF Report 20 (ISBN 978-92-64-99087-6). Some background information concerning the evolution of the project is provided below. 

The basis for the selection of isotopes were taken from the NUBASE-2003 file, which contains basic nuclear properties, hence all known isomers were identified from here. Three evaluated libraries, from within Europe, were used to replace individual NUBASE files, for almost 600 nuclei in all. Two libraries originated from the UK (UKPADD-6.4 and UKHEDD-2.4) and the third from the Decay Data Evaluation Project (DDEP) conducted by the Laboratoire National Henri Bequerel (LNHB) at Saclay, France. Files were also selected from the ENSDF library – these files contain decay data derived from basic nuclear structure data. Approximately 900 nuclei, containing sufficient data to allow calculation of their energy balance to a consistency of better than 1%, were selected from ENSDF.