NEA-0694 DANTE.

DANTE, Activation Analysis Neutron Spectra Unfolding by Covariance Matrix Method

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROBLEM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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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.