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NEA-0694 DANTE.

DANTE, Activation Analysis Neutron Spectra Unfolding by Covariance Matrix Method

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1. NAME OR DESIGNATION OF PROGRAM:  DANTE.
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2. COMPUTERS
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Program name Package id Status Status date
DANTE NEA-0694/01 Tested 01-OCT-1981

Machines used:

Package ID Orig. computer Test computer
NEA-0694/01 IBM 3033 IBM 3033
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3. DESCRIPTION OF PROBLEM OR FUNCTION

The program evaluates activation measurements of reactor neutron spectra and unfolds the results for dosimetry purposes. Different evaluation options are foreseen: absolute or relative fluxes and different iteration algorithms.
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4. METHOD OF SOLUTION

A least-square 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.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

9 activation experiments can be analyzed. 75 energy groups are accepted.
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6. TYPICAL RUNNING TIME:
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS:  STAY'SL uses the same method of least-square fitting.
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9. STATUS
Package ID Status date Status
NEA-0694/01 01-OCT-1981 Tested at NEADB
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10. REFERENCES:
NEA-0694/01, included references:
- M. Petilli:
  "DANTE, Unfolding Code for Energy Spectra Evaluation"
  Part I: Mathematical method
  RT/FI(79)7
- M. Petilli:
  "DANTE, Unfolding Code for Energy Spectra Evaluation"
  Part II: Computer program
  RT/FI(79)8
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0694/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
Calculations are performed in double precision.
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15. NAME AND ESTABLISHMENT OF AUTHOR

          M. Petilli
          Dipartimento Ricerca Tecnologica di Base e Avanzata
          CNEN
          Casaccia
          00060 Santa Maria di Galeria
          Rome
          Italy
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16. MATERIAL AVAILABLE
NEA-0694/01
File name File description Records
NEA0694_01.001 SOURCE F4 924
NEA0694_01.002 SAMPLE PROBLEM INPUT DATA 113
NEA0694_01.003 SAMPLE PROBLEM OUTPUT 1984
NEA0694_01.004 JCL AND INFORMATION 58
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17. CATEGORIES
  • O. Experimental Data Processing

Keywords: activation analysis, least square fit, neutron detectors, neutron flux, response functions.