The file icrp107.json was created based in the publication ICRP, 2008. Nuclear Decay Data for Dosimetric Calculations. ICRP Publication 107. Ann. ICRP 38 with the data from the Supplemental material.
Direct link to the zipped data
The database contains information on the half-lives, decay chains, and yields and energies of radiations emitted in nuclear transformations of 1252 radionuclides of 97 elements.
We need this data as a Python module for opengate.