Computer Programs

NEA-0815 ERINNI.

NEA-0815 ERINNI.

ERINNI, Emission Spectra for Multiple Cascades by Optical Model

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: ERINNI.

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2. COMPUTERS

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Program name	Package id	Status	Status date
ERINNI	NEA-0815/01	Tested	24-MAY-1985

Machines used:

Package ID	Orig. computer	Test computer
NEA-0815/01	IBM 370 series	IBM 3084Q

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3. DESCRIPTION OF PROBLEM OR FUNCTION

Optical model calculation of multiple cascading particle emissions. Computes 42 cross sections for each incident energy, representing all possible compound nucleus processes of types (x,a), (x,ab) and (x,abc) where x can be indifferently a neutron, proton or alpha particle; a and b can be a neutron, a proton, an alpha or gamma particle; and c a neutron or a gamma particle.

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4. METHOD OF SOLUTION

The scattering amplitudes and the other optical model quantities are calculated in accordance with spherical local potentials by the usual methods.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

No width fluctuation correction is included as it is devised for high energy calculations.

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6. TYPICAL RUNNING TIME

Computing time was reduced due to the fact that the various optical model transmission coefficients and consequent decay probabilities at a given incident energy when they are calculated within appropriately narrow energy intervals, lend themselves to interpolation.

NEA-0815/01

NEA-DB executed the test case included in the package on IBM 3084Q in 375 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-0815/01	24-MAY-1985	Tested at NEADB

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10. REFERENCES

- E. Vogt:
Advances in Nucl. Phys. Vol. 1 (1968) Ed. by Berenger-Vogt -
Plenum Press.

NEA-0815/01, included references:

- F. Fabbri and G. Reffo
  ERINNI: An Optical Model Fortran-IV Code for the Calculation of
  Multiple Cascading Particle Emissions.  RT/FI(77)4  (April 1977).
- A. Prince, G. Reffo, E. Sartori:
  "Report on the International Nuclear Model Code Intercomparison,
   Spherical Optical and Statistical Model Study", October 1983
  NEANDC/INDC(NEA)4

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11. MACHINE REQUIREMENTS

240 kbytes of fast core memory is required if used together with the overlay structure.

NEA-0815/01

The test case included in the package runs on IBM 3084Q in 284K bytes of main storage.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0815/01	FORTRAN-IV

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED: MVS-SP (IBM 3084Q).

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHOR

          F. Fabbri and G. Reffo
          Centro di Calcolo del CNEN
          Bologna
          Italy

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16. MATERIAL AVAILABLE

NEA-0815/01

File name	File description	Records
NEA0815_01.003	INFORMATION FILE	63
NEA0815_01.004	ERINNI SOURCE PROGRAM (CARD IMAGES)	2517
NEA0815_01.005	JCL TO RUN THE TEST CASE	56
NEA0815_01.006	ERINNI TEST CASE INPUT DATA	75
NEA0815_01.007	ERINNI TEST CASE PRINTED OUTPUT	203

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17. CATEGORIES

A. Cross Section and Resonance Integral Calculations

Keywords: alpha particles, cross sections, fast neutrons, optical models, protons.