1. NAME AND TITLE OF DATA LIBRARY

RADDECAY 4.02: Radioactive Decay Data for Radiological Assessments.
 

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS

RADDECAY 4.02 (DK4.EXE) - Display Decay Information of Radioactive Nuclides.

MEV 1.03 Nuclide Search and Analysis Utility.
 

NOTE: The RSICC display program is not Y2K compliant and will not run with the PC clock set to the year 2000.

Y2K compatible freeware is available from:
http://www.griffith.edu.au/professional-page/charles-hacker/resources/radiation-decay.
 

3. CONTRIBUTORS

Original Contributor:

Grove Engineering, Inc., Rockville, Maryland.
 

Other Contributor:

University of Connecticut, Storrs, Connecticut.
 

4. HISTORICAL BACKGROUND AND INFORMATION

The data in RadDecay are derived from DLC-80/DRALIST, a data set giving radioactive decay energies, spectra, half lives, and other information. RADDECAY 4.02 is an interactive program for the IBM PC, or compatible, for retrieving and displaying decay information for 497 radionuclides. Data provided include the half life, radioactive daughter nuclides, probabilities per decay. and decay product energies for alpha particles, beta rays, positrons, electrons, x-rays, and gamma rays.
 

5. APPLICATION OF THE DATA

The estimation of radiation dose to man from either external or internal exposure to radionuclides requires a knowledge of the energies and intensities of the atomic and nuclear radiations emitted during the radioactive decay process. The availability of evaluated decay data for the large number of radionuclides of interest is of fundamental importance for radiation dosimetry.

The library includes radionuclides occurring naturally in the environment, those of potential importance in routine or accidental releases from the nuclear fuel cycle, those of current interest in nuclear medicine and fusion reactor technology, and some of those of interest in the estimation of annual limits on intake via inhalation and ingestion for occupationally exposed individuals.
 

6. SOURCE AND SCOPE OF DATA

The radioactive decay data in the library were published in DOE/TIC-11026 (see reference below) and made available as DLC-80/DRALIST in the MEDLIST format.

In addition to the radionuclides of interest in the nuclear fuel cycle, the data base comprises most of the nuclides occurring naturally in the environment, those of current interest in nuclear medicine and fusion reactor technology, and some additional radionuclides of use in the estimation of annual limits of intake and derived air concentrations for occupationally exposed individuals. The current data base contains approximately 500 radionuclides. It is believed that, with few exceptions, the decay data contained in this report are not likely to change significantly over the next few years as the result of new measurements.
 

7. DISCUSSION OF THE DATA RETRIEVAL PROGRAMS

RADDECAY (DK4.EXE) is a program for the IBM PC and compatibles for the retrieval and display of the decay information of radioactive nuclides. It is written in TrueBasic and compiled. The executable program is on the distribution diskette. The data are in a special format for retrieval by RADDECAY which is defined in the documentation. A math co-processor is desirable but not necessary. The data files can be "exported" to an ASCII format. A search routine allows finding the radionuclides that have photon decay in a user specified energy range. The source program is not included, and it is not Y2K compliant.

At the University of Connecticut the MEV Search and Analysis program was developed to assist in the identification of nuclides producing a spectrum on their Multi Channel Analyzer. MEV will search through either Alpha, Beta, or Gamma libraries for single energy line or for a group of energy lines. Each energy line is described by a specific energy in Mev, an uncertainty above and below this value to extend the search through, and a probability lower limit of yield to discriminate out low probability energy lines. Single energy line searches will result in a list of possible nuclides. Multiple energy line searches of up to six lines provide a list of possible nuclides and how many energy lines each nuclide matched. Also available is an option to display all the energy lines of any nuclide.
 

8. DATA FORMAT AND COMPUTER

Executable and coded data files on one DS/HD 3.5-inch diskette (1.44 MB); IBM PC.
 

9. TYPICAL RUNNING TIME

Interactive.
 

10. REFERENCES

a. Included in package:

C. A. Negin and G. Worku, "RadDecay - Radioactive Nuclide Library and Decay Software," Version 4 (September 1993).

M. W. Rota and E. L. Wilds, "READ.ME File of MEV Search and Analysis, Version 1.3" (1993).
 

b. Background information:

D. C. Kocher, "Radioactive Decay Tables--A Handbook of Decay Data for Application to Radiation Dosimetry and Radiological Assessment," DOE/TIC-11026 (1981).
 

11. CONTENTS OF LIBRARY

Included are the documents in 10.a. and one 3.5-in. (1.44 MB) DS/HD diskette written in DOS format which contains the data files and executable file and MEV program.
 

12. DATE OF ABSTRACT

December 1987; revised November 1990, October 1992, March 1994, January 2000.
 

KEYWORDS: RADIOACTIVE DECAY SPECTRA; MICROCOMPUTER