1. NAME AND TITLE
BASACF: Bayesian Approach to Spectrum Adjustment with Covariance Filter.
Institute of Radiation Dosimetry, Prague, Czechoslovakia.
3. CODING LANGUAGE AND COMPUTER
Fortran 77; IBM PC.
4. NATURE OF PROBLEM SOLVED
BASACF adjusts the neutron spectrum based on integral detector measurements and calculation
of an integral dosimetric quantity and its variance. BASACF consists of two independent programs:
BASADAT and BASAUNF. BASADAT calculates the L-D factors of all needed covariance matrices.
BASAUNF adjusts the spectrum by means of the covariance filter.
5. METHOD OF SOLUTION
BASACF uses Bayesian probability applied to a linearized relation between activities, dosimetry
cross sections and flux. All probability distributions are supposed to be normal.
6. RESTRICTIONS OR LIMITATIONS
This version can be used for 45 energy groups and 5 detectors.
7. TYPICAL RUNNING TIME
Using the sample problem TEST1D.DAT, the program BASADAT took about 30 minutes on an
IBM PC/XT with a math co-processor. Using the output corresponding to the same problem,
BASAUNF took about 4 minutes.
8. COMPUTER HARDWARE REQUIREMENTS
IBM PC and compatibles with or without a math co-processor.
9. COMPUTER SOFTWARE REQUIREMENTS
The code was written in Fortran 77 and was tested under PC-DOS (IBM PC). Executable files,
produced by the MICROSOFT's Fortran 77 compiler (version 4.01) and linker (version 3.64) are
M. Tichy, "The Program BASACF: PC Version, Description and User Guide," Report UDZ
254/88 (March 1990).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and a (1.2MB) DOS diskette.
12. DATE OF ABSTRACT
KEYWORDS: MICROCOMPUTER; NEUTRON; UNFOLDING