PSR-0367 GMA.

1. NAME OR DESIGNATION OF PROGRAM:  GMA.

3. DESCRIPTION OF PROGRAM OR FUNCTION

The simultaneous evaluation of the cross sections of 6Li(n,alpha), 6Li(n,n), 10B(n,alpha0), 10B(n,alpha1), 10B(n,n) 197Au(n,gamma), 238U(n,gamma), 235U(n,f), 239Pu(n.f), 238Pu(n,f), and the thermal constants was part of the evaluation of these data for ENDF/B-VI. The FORTRAN codes and the data files used for the simultaneous evaluation are known as GMA. Corrections for some data reported in the literature and the addition of several new data sets results in negligible changes except for the fission cross sections where minor changes occur relative to the evaluation for ENDF/B-VI. The Fortran codes and the data files used for the simultaneous evaluation are included in this package.

4. METHOD OF SOLUTION

GMA utilizes the method of generalized least-squares estimation. Associated codes included are RCL (which is used to edit, list and expand the basic data file) and DAT (which is used to reduce the cross section data to a common energy grid).

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Interpolation, extrapolation, labeling, and markers are used which restrict the application to the cross sections listed under number four above.

6. TYPICAL RUNNING TIME

RSICC machines ran the sample problem within four minutes CPU time.

7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM

8. RELATED AND AUXILIARY PROGRAMS

RCL: Editing and listing of the data file GMDATA.CRD.
DAT: Reduction of the data file GMDATA.CRD to the input data file for GMA:data.gma.

10. REFERENCES

- M. Nakamura and K. Shibata:
  Uncertainties in Evaluated Total Cross-Section Data for 14
  Nuclides Contained in JENDL-3.2
  JAERI-Research 95-068 (October 1995)
- W.P. Poenitz:
  Proceedings of the Conference on Nuclear Data Evaluation Methods     and Procedures.
  BNL-NCS-51363, Vol. I, 249 (1981)

- Poenitz, W.P. and Aumeier, S.E.:
  The Simultaneous  Evaluation of the Standards and Other Cross Sections of
  Importance for Technology.
  ANL/NDM-139, (ENDF-358) (1997)

11. MACHINE REQUIREMENTS

GMA runs under UNIX operating systems, on Sun and IBM RS/6000 workstations, and on personal computers.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

At RSICC the code was successfully tested on an IBM RS/6000 model 590 under AIX 4.2 with XLF77 version 3.2.2 and on the Sun Sparc 20 running Sun OS 5.6 (Solaris 2.6) with f77 version 4.2. Executables created with the LAHEY F77L3/EM-32 Version 5.2 compiler are included to run on PCs in a DOS window of Windows95.

15. NAME AND ESTABLISHMENT OF AUTHORS

Contributed by:
                Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.

Developed by:
                Argonne National Laboratory - West
                Idaho Falls, Idaho, U. S. A.

README.RSI Installation instructions
DAT.F Fortran source; reduces cross-sections of original data sets to energy grid
RCL.F Fortran source; reads, copies, lists and edits GMDATA.CRD
GMA.F Fortran source; generalized least-squares evaluation code
README Information file
SAMPLE/ Input and output for test case (9 files)
DOS/ Executables for PC version (3 files)