1. NAME AND TITLE OF DATA LIBRARY

NucDecayCalc: Nuclear Decay Data for Radiation Dosimetry Calculations for ICRP.  We recommend the newer release of the Decay Calculator that is included in the CCC-553/RASCAL  package.
 

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS

DecayCalc Version 1.0.0: Decay Calculator for DLC-172/NucDecay Data.
 

3. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

4. HISTORICAL BACKGROUND AND INFORMATION

The Dosimetry Research Group (DRG) of the Health Sciences Research Division at ORNL has for several years maintained data bases of nuclear decay data for use in dosimetric calculations. The data on mean and unique energy plus intensity have been previously published, in abridged form, in Publication 38 of the International Commission on Radiological Protection (ICRP 1983).

5. APPLICATION OF THE DATA

This data base was designed to address the needs in medical, environmental, and occupational radiation protection. DLC-172/NUCDECAY is required by the CCC-620/SEECAL program to calculate age-dependent specific effective energies.
 

6. SOURCE AND SCOPE OF DATA

The unabridged data used in preparing ICRP Publication 38 are distributed in electronic form in this package. The collection consists of data on the energies and intensities of radiations emitted by the 825 radionuclides reported, although abridged, in ICRP Publication 38 plus an additional 13 radionuclides evaluated during preparation of a monograph for the Medical Internal Radiation Dose (MIRD) Committee of the Society of Nuclear Medicine. Each collection is contained in an ASCII file (INDEXR.DAT) which is a sorted list of the radionuclides containing the decay chain information.
 

7. DISCUSSION OF THE DATA RETRIEVAL PROGRAM

The utility code DecayCalc extracts the decay data from the library for radionuclide(s) specified by the user. It computes the activities of radionuclides present after decay and ingrowth over a user-specified time period from 1 minute to 50 years. Decay data for any decay chain may be displayed and printed either in tabular form or graphically. DecayCalc, in a slightly modified version, will be a part of CCC-553/Rascal v3.

DecayCalc is a Windows application that runs under Microsoft Windows 95 or 98, or Microsoft Windows NT 4.0 or later. The Compac Fortran 77 compiler was used to compile the code. The full source for DecayCalc is not provided but will be distributed when Rascal V3 is released.
 

8. DATA FORMAT AND COMPUTER

ASCII; Pentium running Windows 95/98/NT (D00202PC58600).
 

9. TYPICAL RUNNING TIME

The code is interactive.
 

10. REFERENCES

a) Documentation available with library:

A.L. Sjoreen, "Decay Calculator" (March 2000) to be published as part of the Rascal V3 documentation.

b) Background information:

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

11. CONTENTS OF LIBRARY

Included are the referenced document and a CD written in DOS format which includes the installation files, data library, and the utility code.
 

12. DATE OF ABSTRACT

April 2000.
 

KEYWORDS: MICROCOMPUTER; RADIOACTIVE DECAY SPECTRA; RADIONUCLIDES