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IAEA1303 FUP1.

FUP1, Fast Neutron Cross-Sections for Fissile Nuclei by Hauser-Feshbach Theory

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM 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 AUTHORS, MATERIAL, CATEGORIES
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1. NAME OR DESIGNATION OF PROGRAM:  FUP1.
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2. COMPUTERS
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Program name Package id Status Status date
FUP1 IAEA1303/01 Arrived 06-APR-2001

Machines used:

Package ID Orig. computer Test computer
IAEA1303/01 FACOM M-340-S
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3. DESCRIPTION OF PROGRAM OR FUNCTION

FUP1 is a unified program for calculating fast neutron data for fissile nuclei in the energy range 10KeV-20MeV and in ENDF/B-4 format. The optical model Hauser- Feshbach theory with width fluctuation correction (WHF) and pre-equilibrium (PE) statistical theory based on the exciton model is used.
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4. METHOD OF SOLUTION

The radial wave function in the optical model is solved by the COWELL method. Double precision arithmetic is used. The GAUSS-LEGENDRE ten points formula is used for numerical integrations.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

1. The calculations are restricted to fissile nuclei, for which there are no reactions with charged particle emission.
2. Only one isotope is referred in one calculation.
3. The energy region of incident particles is restricted to 1KeV- 20KeV. In this region the maximum number of energy points is 150.
4. The maximum number of energy points for the outgoing secondary neutrons is 100.
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6. TYPICAL RUNNING TIME

The running time depends on the number of energy points; the number of target nucleus levels and whether secondary neutron spectra are calculated. For example, calculating all the reaction cross sections and secondary neutron spectra of U-235 (8 energy points, 36 levels) takes 10 minutes CPU time on a M-340S.
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7. UNUSUAL FEATURES OF THE PROGRAM:  None.
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8. RELATED AND AUXILIARY PROGRAMS

ASFP automatically searches for a group of optical fission parameters. - ASOP automatically searches for a group of optimal optical potential parameters. They are two auxiliary programs of FUP1.
MUP-2 (IAEA0907).
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9. STATUS
Package ID Status date Status
IAEA1303/01 06-APR-2001 Masterfiled Arrived
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10. REFERENCES

- Cai Chonghai et al.:
  MUP-2 (IAEA0907/01). News from the NEA Data Bank, no.1, 1986 p.7
- R.J. Howerton:
  Nucl. Sci. Eng. 62(1977), p.438
- C.M. Perey et al.:
  Atomic Data and Nuclear Data Tables, 17, 3 (1976)
- J.J. Griffin:
  Phys. Rev. Let. 17, 478 (1966)
- C.K. Cline:
  Nucl. Phys. 193, 417 (1972)
- A. Gilbert and A.G.W. Cameron:
  Can. J. Phys. 43, 1446 (1965)
IAEA1303/01, included references:
- Cai Chong-Hai and Wuo Yi-xin:
  Direction for Using Programs FUP1, ASFP and ASOP
  (May 22, 1995)
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11. MACHINE REQUIREMENTS

Discs and printer are necessary for output. Amount of memory : 3072 Kbytes.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
IAEA1303/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  Facom OS IV/F4 and VAX/VMS.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

  Cai Chonghai, Zuo Yi-xin
  Nakai University, Tianjing 300071
  P.R. China

  Yan Shiwei
  Chinese Nuclear Data Centre
  China Institute of Atomic Energy
  Beijing 102413
  P.R. China
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16. MATERIAL AVAILABLE
IAEA1303/01
miscellaneous    mag tapeFUP1.ARJ Compressed Archive File           MISTP
load module      mag tapeARJ.EXE Executable File to uncompress      LODTP
miscellaneous    mag tapeARJ.HLP Information File                   MISTP
prog. note               Direction for Using FUP1,ASFP,ASOP (May 95)NOTPT
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17. CATEGORIES
  • A. Cross Section and Resonance Integral Calculations

Keywords: Hauser-Feshbach theory, fission spectra, optical models, statistical models.