1. NAME AND TITLE
DANTE: Unfolding Code System for Energy Spectra Evaluation for Dosimetry Purposes.
Comitato Nazionale per l'Energia Nucleare, Centro di Calcolo, (CNEN) Rome, Italy, through the
OECD NEA Data Bank, Gif-sur-Yvette, France.
3. CODING LANGUAGE AND COMPUTER
Fortran IV; IBM 370/168 and 3033.
4. NATURE OF PROBLEM SOLVED
DANTE evaluates activation measurements of reactor neutron spectra and unfolds the results for
5. METHOD OF SOLUTION
A least-squares fit method is used. A correlation between available data and their uncertainties has
been introduced by means of flux and activity variance-covariance matrices. Cross sections are
assumed to be constant, i.e., with variance-covariance matrix equal to zero. The Lagrange multipliers
method has been used for calculating the solution. Different evaluation options may be selected such
as absolute or relative fluxes and different iteration algorithms.
6. RESTRICTIONS OR LIMITATIONS
9 activation experiments can be analyzed. 75 energy groups are accepted.
7. TYPICAL RUNNING TIME
Compiling and executing the sample problem under MVS with the Fortran H compiler on an IBM 3033 required:
STEP CPU I/O REGION
FORT 9 38 416
LKED 1 164 156
GO 1 7 128
8. COMPUTER HARDWARE REQUIREMENTS
DANTE is operable on IBM 370/168 or IBM 3033 computers. It required 416 K to compile on
an IBM 3033.
9. COMPUTER SOFTWARE REQUIREMENTS
A Fortran H compiler is required.
M. Petilli, "DANTE, Unfolding Code for Energy Spectra Evaluation," Part I: Mathematical Method, RT/FI(79)7 (1979).
M. Petilli, "DANTE, Unfolding Code for Energy Spectra Evaluation," Part II: Computer Program,
11. CONTENTS OF CODE PACKAGE
Included are the referenced documents and one (1.2MB) DOS diskette which contains the source
code and sample problem input and output, and JCL.
12. DATE OF ABSTRACT
June 1982; reviewed May 1984.
KEYWORDS: ACTIVATION DETECTORS; UNFOLDING