NEA-1644 ZZ-DECDC.

1. NAME OR DESIGNATION OF PROGRAM:  ZZ-DECDC.

3. DESCRIPTION OF PROGRAM OR FUNCTION

DECDC is a data package of nuclear decay data files used for external and internal dose calculation. DECDC includes the nuclear decay data for (1) 817 radionuclides that are listed in ICRP Publication 38 (ICRP 1983) and (2) 162 radionuclides with half-lives greater than 10 min that are not listed in ICRP Publ.38 and their 28 daughters nuclides. The following information is included for each nuclide: physical half-life; decay modes and the branching fractions; energies and intensities of alpha particles, beta particles, gamma rays, internal conversion electrons, X rays, and Auger electrons emitted in nuclear transformation; b particle spectrum. For spontaneously fissioning nuclides, the average energies and intensities of neutrons, fission fragments, prompt gamma rays, delayed gamma rays, and beta particles were also included.
The data files are prepared in two types of format: Publ.38 and NUCDECAY (Eckerman 1993) formats. The Publ.38 format is a tabular form of ICRP Publ.38. In the NUCDECAY format, the type of radiation is described by the identifying index code; the format is convenient for converting suitable forms of respective computer codes.

4. METHODS

The nuclear decay data files in DECDC were compiled from decay data sets of the Evaluated Nuclear Structure Data File (ENSDF) (Tuli 1987), 1997 version, using the computer program EDISTR (Dillman 1980) (PSR-0191). A comprehensive description of the theoretical and numerical techniques is described in the manual of EDISTR.

8. RELATED OR AUXILIARY PROGRAMS

The formats of the data files, Publ.38 and NUCDECAY formats, in DECDC are those used as standard forms in dose calculation in radiation protection. The data files of DECDC can be used as update of Publ.38 and NUCDECAY.

10. REFERENCES

International Commission on Radiological Protection.
Radionuclide Transformations: Energy and Intensity of Emissions.
ICRP Publication 38. Ann. ICRP 11-13 (1983).

Eckerman, K.F., Westfall, R.J., Ryman, J.C. and Cristy, M.
Nuclear Decay Data Files of the Dosimetry Research Group.
ORNL/TM-12350 (1993).

Tuli, J.K.
Evaluated Nuclear Structure Data File: A Manual for Preparing of Data Sets.
BNL-NCS-51655-Rev.87 (1987).

Dillman, L.T.
EDISTR: A Computer Program to Obtain a Nuclear Decay Data Base for Radiation Dosimetry.
ORNL/TM-6689 (1980).

- A. Endo, T. Tamura and Y. Yamaguchi:
Compilation of Nuclear Decay Data used for Dose Calculations:
Data for Radionuclides not listed in ICRP Publication 38
JAERI-Data/Code 99-035 (July 1999)
- A. Endo and Y. Yamaguchi:
Compilation of Nuclear Decay Data used for Dose Calculations:
Revised Data for Radionuclides listed in ICRP Publication 38
JAERI-Data/Code 2001-004 (March 2001)

11. HARDWARE REQUIREMENTS:  The requirement for hard disk space is 60 MB in total.

13. SOFTWARE REQUIREMENTS

EPOSN PC SL-2. The data files are in ASCII format and can be read by both PC and UNIX systems.

15. NAME AND ESTABLISHMENT OF AUTHORS

Akira Endo and Yasuhiro Yamaguchi.
Department of Health Physics,
Japan Atomic Energy Research Institute,
Tokai, Ibaraki 319-1195, JAPAN

\publ38\ nuclear decay data files for the radionuclides listed in ICRP Publ 38
\non_publ38\ data files for the radionuclides not listed in ICRP Publ 38
filelist.pdf List of filename and corresponding decay data
readme.pdf Contents of the nuclear decay data files DECDC V.1.0
program abst of DECDC.doc Abstract
JAERI-Data/Code 99-035 in pdf format
JAERI-Data/Code 2001-004 in pdf format