RSIC COMPUTER CODE PSR-058

1. NAME AND TITLE

ADLER III: A Program to Calculate Cross Sections from Adler-Adler Resonance Parameters

ADLER III is a revision and extension of the ADLER program.

2. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; IBM 360/370.

4. NATURE OF PROBLEM SOLVED

ADLER III calculates total, capture and fission cross-sections from the corresponding Adler-Adler parameters in the ENDF/B File 2 and also Doppler broadens cross-sections.

5. METHOD OF SOLUTION

ADLER III uses Adler-Adler formalism. Doppler broadening is provided through the use of the psi and phi functions. It can read the resonance parameters from an ENDF/B tape (BCD mode) or the resonance parameters may be input on cards, if desired.

6. RESTRICTIONS OR LIMITATIONS

ADLER III can handle resonance data up to a maximum of 10 isotopes with a total number of 500 resonances. It assumes that the resolved resonance parameters are given for one energy range which is the same for all the isotopes of an element. The mesh points at which the cross-sections are calculated can be varied.

7. TYPICAL RUNNING TIME

On the IBM 360/91 computer, calculations of cross-sections of one isotope with 70 resonances and 40 mesh points between resonances takes 7 seconds without Doppler broadening or 21 seconds with Doppler broadening.

8. COMPUTER HARDWARE REQUIREMENTS

ADLER III is operable on the IBM 360/370 computers. It requires 120 K bytes on the IBM 360/91 computer.

9. COMPUTER SOFTWARE REQUIREMENTS

A Fortran H compiler and the IBM OS/360 are required.

10. REFERENCE

R. Q. Wright, "ADLER-III: A Program to Calculate Cross Sections from Adler-Adler Resonance Parameters," ORNL-TM-4257 (June 1973).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette which contains the source code and sample problem input and output.

12. DATE OF ABSTRACT

January 1984.