last modified: 10-AUG-1987 | catalog | categories | new | search |

IAEA0944 POLLA/IAECTA.

POLLA/IECTA, ENDF/B Reich-Moore to Adler-Adler Resonance Parameter Conversion

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1. NAME OR DESIGNATION OF PROGRAM:  POLLA/IAECTA.
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2. COMPUTERS
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Program name Package id Status Status date
POLLA/IAECTA IAEA0944/01 Tested 10-AUG-1987

Machines used:

Package ID Orig. computer Test computer
IAEA0944/01 CDC CYBER 170 CDC CYBER 740
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3. DESCRIPTION OF PROGRAM OR FUNCTION

POLLA1 transforms Reich-Moore resolved resonance parameters to the corresponding positive momentum Adler-Adler ones. It is designed to run directly on a file in the ENDF/B format, creating a new file in which the Reich-Moore parametrization has been replaced by the Adler-Adler one.
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4. METHOD OF SOLUTION

The Adler-Adler poles are obtained by applying  Newton's method to the inverse of the determinant of the Reich-Moore pole matrix. The perturbative solution of R.B. Perez and G. de Saussure, Phys. Rev. C10 (1974)187, is used as a first guess. The residues at the poles are calculated using a simple numerical difference method.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

As currently dimensioned, the program permits a maximum of 400 coherent resonances. The transformation itself, which neglets all negative momentum poles, is only accurate for heavy nuclei.
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6. TYPICAL RUNNING TIME:  Varies greatly from case to case.
IAEA0944/01
NEA-DB executed the test case included in this package  on a CDC CYBER 740 computer in 20.7 seconds of CPU time.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

POLLA1 is an improved and extended  version of the code POLLA of G. de Saussure and R.B. Perez.
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9. STATUS
Package ID Status date Status
IAEA0944/01 10-AUG-1987 Tested at NEADB
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10. REFERENCES

- R.B. Perez and G. de Saussure,
  Phys. Rev C10 (1974)187.
IAEA0944/01, included references:
- G.  de Saussure  and R.  B. Perez:
  POLLA, A  FORTRAN Program to  Convert R-Matrix-Type Multilevel
  Resonance Parameters for Fissile Nuclei into  Equivalent Kapur
  Peierls-Type Parameters.
  ORNL-TM-2599  (June 1969)
- B.V. Carlson, E.S. Chalhoub and M. Melnikoff:
  Modification and Testing of the Code POLLA
  IEAv/NT-08/85  (August 12, 1985)
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
IAEA0944/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  Standard.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

         B.V. Carlson, E.S. Chalhoub and M. Melnikoff
         Instituto de Estudos Avancados/CTA
         Rodovia dos Tamoios km 5,5
         12200 Sao Jose dos Campos, SP
         BRASIL
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16. MATERIAL AVAILABLE
IAEA0944/01
File name File description Records
IAEA0944_01.001 Information file 46
IAEA0944_01.002 Fortran source 690
IAEA0944_01.003 Sample input data (for FT05) 2
IAEA0944_01.004 Library data (for FT01) 284
IAEA0944_01.005 Sample output (FT06) 504
IAEA0944_01.006 Sample output (FT02) 420
IAEA0944_01.007 JCL 8
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17. CATEGORIES
  • A. Cross Section and Resonance Integral Calculations
  • M. Data Management

Keywords: ENDF/B, adler-adler formula, cross sections, neutron cross sections, nuclear reactions, reich-moore formula, resolved region, resonance, resonance absorption, resonance scattering.