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RSICC CODE PACKAGE CCC-799
1. NAME AND TITLE
HEPROW: Unfolding of Pulse Height Spectra
Using Bayes Theorem and Maximum Entropy Method.
Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
through the OECD Nuclear Energy Agency Data Bank, Issy-Les Moulineaux, France.
3. CODING LANGUAGE AND COMPUTER
FORTRAN 90, Windows, Linux, MacOS, ALPHA/AXP and HP Workstations
4. NATURE OF PROBLEM SOLVED
HEPROW unfolds pulse height spectra for
use in spectral neutron or photon fluence determination. HEPROW consists of
the following programs:
transforms a file containing a measured pulse-height to a file in HEPRO format.
carries out GAUSSIAN broadening of a response matrix, and re-binning of a
combines HEPRO files and carries out multiplication/division addition/subtraction
folds a fluence file with a response matrix and compares measured and calculated
is a modified SAND-II code (C00112MNYCP03) for unfolding. (Logarithm of pulse-height
spectrum is used).
is a maximum entropy code for unfolding.
is a maximum entropy code for unfolding in which uncertainty propagation is performed
with a so-called ambiguity term.
plots data files or parts of the response function library on the screen. It
may be used for a variety of data formats of the files, including the ENDF
plots control data curves from a plot file created while one of the other codes
5. METHOD OF SOLUTION
The Bayes theorem and the maximum entropy method are used.
6. RESTRICTIONS OR LIMITATIONS
7. TYPICAL RUNNING TIME
On the order of 10s of minutes for the sample problem script.
8. COMPUTER HARDWARE REQUIREMENTS
X86 or X86_64 processor.
9. COMPUTER SOFTWARE REQUIREMENTS
precompiled executables are included. All other platforms require a Fortran 90
compiler. The source codes were compiled by the author with COMPAQ visual
FORTRAN 6.1 professional edition. HEPROW was tested at RSICC on a Zeon quad
core processor running Windows 7 64 bit and XP sp3 32 bit virtual machine and a
REDHAT Linux machine with Intel 11.1 fortran compilers.
Manfred Matzke, “The HEPROW Program System.”
Manfred Matzke, “Unfolding Methods.”
11. CONTENTS OF CODE PACKAGE
The package is transmitted on a CD which includes reference
material, source files, precompiled Windows executables, sample input and
output files and a sample problem script for Windows and Linux/BSD systems.
12. DATE OF ABSTRACT
KEYWORDS: NEUTRON, PHOTON, UNFOLDING