NEA-0718 CRAPONE.

CRAPONE, Optical Model Potential Fit of Neutron Scattering Data

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: 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.