1. NAME AND TITLE

RFUNC: Code System to Analyze Differential Scattering Data.

AUXILIARY CODES

RFUNC_X: Calculates contributions from various spin groups.

MAKPA: Converts a SAMMY (PSR-158) parameter file into a file readable by RFUNC and RFUNCT_XT.

2. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

Fortran 77; VAX family.

4. NATURE OF PROBLEM SOLVED

RFUNC is used to analyze high resolution differential elastic-scattering data from spin zero nuclides in the resonance energy region at ORELA.

5. METHOD OF SOLUTION

RFUNC is based upon the real R-function formalism which ignores the capture reaction channel since only resonances having neutron widths much larger than their capture widths are observed in the differential scattering data.

6. RESTRICTIONS OR LIMITATIONS

RFUNC only deals with scattering from spin zero nuclides.

7. TYPICAL RUNNING TIME

The sample input took only a few seconds on a VAX 6000 under the VAX/VMS operating system.

8. COMPUTER HARDWARE REQUIREMENTS

The code runs on the VAX family of computers.

9. COMPUTER SOFTWARE REQUIREMENTS

The code was written in Fortran 77 and uses VAX Fortran compiler under the VMS operating system.

10. REFERENCE

F. G. Perey, RFUNC - A Code To Analyze Differential Elastic-Scattering Data, ORNL/TM-11112 (March 1989.)

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one DS/DD (360 K) 5.25 inch diskette which includes source files, command files, and sample input and output.

12. DATE OF ABSTRACT

October 1991.