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NEA-0718 CRAPONE.

CRAPONE, Optical Model Potential Fit of Neutron Scattering Data

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1. NAME OR DESIGNATION OF PROGRAM:  CRAPONE.
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2. COMPUTERS
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Program name Package id Status Status date
CRAPONE NEA-0718/01 Tested 22-SEP-1986

Machines used:

Package ID Orig. computer Test computer
NEA-0718/01 IBM 370 series IBM 3084Q
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3. DESCRIPTION OF PROBLEM OR FUNCTION

Automatic search for local and non-local optical potential parameters for neutrons. Total, elastic, differential elastic cross sections, l=0 and l=1 strength functions and scattering length can be considered.
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4. METHOD OF SOLUTION

A fitting procedure is applied to different sets of experimental data depending on the local or non-local approximation chosen. In the non-local approximation the fitting procedure can be simultaneously performed over the whole energy range. The best fit is obtained when a set of parameters is found where CHI**2 is at its minimum. The solution of the system equations is obtained by diagonalization of the matrix according to the Jacobi method.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME:
NEA-0718/01
Since no test case was available, NEA-DB only compiled  and linked the program on an IBM 3081Q computer, which required 3 seconds of CPU time.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

CERBERO - A FORTRAN program for the calculation of nuclear reaction cross sections.
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9. STATUS
Package ID Status date Status
NEA-0718/01 22-SEP-1986 Tested at NEADB
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10. REFERENCES
NEA-0718/01, included references:
- F. Fabbri, G. Fratamico and G. Reffo
  CRAPONE: A Fortran-IV Code for the Automatic Search for Local and
  non Local Optical Potential Parameters for Neutrons.
  RT/FI(77)  (April 1977).
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0718/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  IBM370/OS.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHOR

          F. Fabbri, G. Fratamico and G. Reffo
          Centro di Calcolo del CNEN
          Bologna
          Italy
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16. MATERIAL AVAILABLE
NEA-0718/01
File name File description Records
NEA0718_01.001 This information file 64
NEA0718_01.002 CRAPONE source program (FORTRAN-IV) 1658
NEA0718_01.003 JCL 115
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17. CATEGORIES
  • A. Cross Section and Resonance Integral Calculations
  • O. Experimental Data Processing

Keywords: cross sections, data processing, elastic scattering, optical models.