last modified: 24-FEB-1981 | catalog | categories | new | search |

NEA-0675 AMALTHEE.

AMALTHEE, Emission Spectra for N, D, H3, He3, He4 Induced Reactions

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1. NAME OR DESIGNATION OF PROGRAM:  AMALTHEE.
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2. COMPUTERS
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Program name Package id Status Status date
AMALTHEE NEA-0675/01 Tested 24-FEB-1981

Machines used:

Package ID Orig. computer Test computer
NEA-0675/01 CDC 7600 CDC 7600
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3. DESCRIPTION OF PROBLEM OR FUNCTION

Calculates the energy spectra of particles emitted in (i,x) and (i,xy) reactions. The incoming (i) and outgoing (x,y) particles can be neutrons, protons, deuterons, tritons, helium-3 or alpha particles.
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4. METHOD OF SOLUTION

The master equations of the exciton (pre- equilibrium Griffin) model describing the equilibration of the composite nucleus are solved exactly by a matrix method up to t = infinite.
In this way, pre-equilibrium as well as equilibrium features of a reaction are taken into account. Particle spectra are interpreted without adding any extra evaporative component.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME

Compilation with FTN compiler, OPTN=2, takes  7.9 seconds. The sample problem which computes the reaction FE54 + p (28.8 MeV) taking into account 6 simple and 5 double reactions takes 25.4 seconds on the CDC 7600.
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7. UNUSUAL FEATURES OF THE PROGRAM

The program is capable of carry- ing out an improved pre-equilibrium calculation that predicts the absolute values of the energy differential cross sections without having to superimpose any evaporative component. The artificial time subdivision previously introduced between the pre-equilibrium and equilibrium parts of a reaction have been removed.
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
NEA-0675/01 24-FEB-1981 Tested at NEADB
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10. REFERENCES:
NEA-0675/01, included references:
- O. Bersillon and L. Faugere:
  "AMALTHEE: A FORTRAN Code for Spectra and Cross Section
   Calculations within the Exciton Model"
  NEANDC(E) 191"L", INDC(FR) 26/L (October 1977).
- L. Faugere and O. Bersillon:
  A New Approach for Interpreting Nuclear Spectra within a
  Preequilibrium Model
  NEANDC(E) 184"L", INDC(FR) 18/L.
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11. MACHINE REQUIREMENTS:
Memory requirement on CDC 7600 is 55,000 words.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0675/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  SCOPE 2.1.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

Single
precision (60 bits/word) is used except for matrix calculation which is done in double precision. No special CDC programming instruction  is used except PROGRAM in the first card.
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15. NAME AND ESTABLISHMENT OF AUTHOR

O. Bersillon and L. Faugere
Service de Physique Nucleaire
Centre d'Etudes de Bruyeres les Chatel
B.P. 561
92542 Montrouge Cedex (France).
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16. MATERIAL AVAILABLE
NEA-0675/01
File name File description Records
NEA0675_01.001 AMALTHEE SOURCE (FORTRAN) 2611
NEA0675_01.002 S.P. INPUT 177
NEA0675_01.003 S.P. OUTPUT 2654
NEA0675_01.004 JCL AND INFORMATION 21
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17. CATEGORIES
  • A. Cross Section and Resonance Integral Calculations

Keywords: nuclear models, particle interactions, precompound-nucleus emission.