last modified: 01-APR-1979 | catalog | categories | new | search |

IAEA0829 PELINSCA.

PELINSCA, Elastic Scattering and Total Cross-Sections and Polarization by Hauser-Feshbach

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1. NAME OR DESIGNATION OF PROGRAM:  PELINSCA.
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2. COMPUTERS
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Program name Package id Status Status date
PELINSCA IAEA0829/01 Tested 01-APR-1979

Machines used:

Package ID Orig. computer Test computer
IAEA0829/01 IBM 360 series IBM 360 series
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3. NATURE OF PHYSICAL PROBLEM SOLVED

Calculates differential and total cross sections as well as polarization for nuclear elastic scattering of spin 0 or spin 1/2 particles. Calculates cross sections (differential and total) and decay gamma ray angular correlation for inelastic processes by means of standard Hauser-Feshbach (HF) theory or with modified HF theory including width fluctuation corrections. In elastic scattering optical model parameters may be optimized in a least squares procedure involving experimental measurements.
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4. METHOD OF SOLUTION

Schroedinger equation for complex potentials is  solved according to Fox-Goodwin method of numerical integration.
Coulomb wave functions are calculated by using recurrence relations  depending on range of Coulomb and energy parameters. Least squares fits are made using parameter grid and direction of steepest descent. Statistical model calculations are made using closed mathematical expressions.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Elastic scattering calculations limited to spin 0 or spin 1/2 particles. Number of partial waves limited to 51. Statistical model calculations on targets with spin less or equal to 5 and with partial waves up to l=6. Not suitable for heavy-ion Hauser- Feshbach calculations without first removing dimensional limitations. Program handles up to 3 reaction types simultaneously, e.g. (p,p), (p,n) and (p,alpha), each reaction channel having up to 33 final nuclear states.
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6. TYPICAL RUNNING TIME

2 minutes on IBM 370/155. Strongly dependent on type of calculation performed (elastic scattering or Hauser-Feshbach), the number of incident particle energy points and  the number of reactions and final states in a statistical model calculation. Running time may vary between 30 sec and as much as 20  to 30 minutes on above computer.
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7. UNUSUAL FEATURES OF THE PROGRAM

Program permits general and automatic statistical model calculations involving many final nuclear states and up  to three different types of reactions.
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8. RELATED AND AUXILIARY PROGRAMS

Uses IBM 370/155 based computer routines DATE and TIME, which may be replaced by local equivalents or removed from program.
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9. STATUS
Package ID Status date Status
IAEA0829/01 01-APR-1979 Tested at NEADB
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10. REFERENCES

- C.A. Engelbrecht, H. Fiedeldey and J.W. Tepel:
  "PELINSCA, A Program for Nuclear Elastic and Inelastic Scattering Calculations"
  South African Atomic Energy Board Report PEL-202 (1974).
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11. MACHINE REQUIREMENTS

208 kbytes of main storage. Disk for temporary storage of results in certain cases.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
IAEA0829/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  IBM 360 O.S. MVT.
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

Since there is constant cross referencing between different programs any changes to the common must be made with extreme care.
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15. NAME AND ESTABLISHMENT OF AUTHOR

    C.A. Engelbrecht, H. Fiedeldey and J.W. Tepel
    Atomic Energy Board
    Private Bag 256
    Pretoria 0001
    South Africa.
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16. MATERIAL AVAILABLE
IAEA0829/01
File name File description Records
IAEA0829_01.002 SOURCE PROGRAM (F4,EBCDIC) 2889
IAEA0829_01.003 JCL 31
IAEA0829_01.004 SAMPLE PROBLEM INPUT DATA 23
IAEA0829_01.005 SAMPLE PROBLEM PRINTED OUTPUT 420
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17. CATEGORIES
  • A. Cross Section and Resonance Integral Calculations

Keywords: Hauser-Feshbach theory, cross sections, elastic scattering, inelastic scattering, least square fit, polarization, statistical models.