In this report, the Commission provides an electronic database of the physical data needed in

calculations of radionuclide-specific protection and operational quantities. This database supersedes the

data of Publication 38 (ICRP, 1983), and will be used in future ICRP publications of dose coefficients for

the intake of or exposure to radionuclides in the workplace and the environment.

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. The CD accompanying the

publication provides electronic access to complete tables of the emitted radiations, as well as the beta and

neutron spectra. The database has been constructed such that user-developed software can extract the data

needed for further calculations of a radionuclide of interest. A Windows-based application is provided to

display summary information on a user-specified radionuclide, as well as the general characterisation of

the nuclides contained in the database. In addition, the application provides a means by which the user can

export the emissions of a specified radionuclide for use in subsequent calculations.

Keywords: Radionuclide transformation, half-life, beta spectra, fission neutron spectra, Auger-electron spectra