1. NAME AND TITLE

DIMEN: Code System for Isotope Identification by Gamma-Ray Analysis.

2. CONTRIBUTOR

Riga Radioisotope Research Institute, Riga, Latvia.

3. CODING LANGUAGE AND COMPUTER

Pascal; IBM PC (P00341/IBMPC/00).

4. NATURE OF PROBLEM SOLVED

For a set of a priori given nuclides taken from a work library, DIMEN uses median estimates of the peak areas and estimates of their errors to produce a list of possible nuclides matching a gamma-ray line and some measure of the reliability of this assignment.

5. METHOD OF SOLUTION

The identification of a given radionuclide is obtained by searching for a match with the energy information of a database. This procedure is performed in an interactive graphic mode by markers that superimpose, on the experimental data, the energy information provided by a previously elaborated data library. This library of experimental data includes approximately 16682 gamma-energy lines related to 749 known gamma emitter radioisotopes currently listed by the ICRP.

6. RESTRICTIONS OR LIMITATIONS

Number of channels: 4096.

7. TYPICAL RUNNING TIME

Interactive. No timing was attempted.

8. COMPUTER HARDWARE REQUIREMENTS

The code was tested on a PC 486 but should run on all IBM PC compatible computers.

9. COMPUTER SOFTWARE REQUIREMENTS

The code was written in Pascal. The original source code file was broken into several units by RSIC to test compilation using Microsoft QuickPascal.

10. REFERENCES

V. S. Kondrashov, Z. D. Moroz, A. A. Kolyshkin, and Remi Vaillancourt, "A Computer Program for the Identification of Nuclides by Using Median Estimates of Peak Areas in Gamma-Ray Spectra," Nucl. Inst. Meth. Phys. Res. A328, 542-546 (1993).

V. S. Kondrashov, l. Sajo-Bohus, and E. D. Greaves, "Al Alternative Approach to Process Gamma-Ray Spectral Data," Specrochimica Acta, 49B (9), 941-945 (1994).

Informal Notes: "Description of the MAKEBASE and DIMEN Programs" (1995).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and 2 3.5-in. DS/DD (1.44 MB) diskettes written in DOS format.

12. DATE OF ABSTRACT

January 1996.