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IAEA1266 CFUP1.

CFUP1, Neutron or Charged-Particle Reactions of Fissile Nuclei up to 33 MeV

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1. NAME OR DESIGNATION OF PROGRAM:  CFUP1.
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2. COMPUTERS
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Program name Package id Status Status date
CFUP1 IAEA1266/01 Arrived 12-APR-2001

Machines used:

Package ID Orig. computer Test computer
IAEA1266/01 FACOM M-340-S
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3. DESCRIPTION OF PROGRAM OR FUNCTION

CFUP1 is a program for calculating the neutron or charged particles (p, d, t, He3, alpha) induced reactions of fissile nuclei in the incident energy range up  to 33 MeV.
CFUP1 has been developed within the framework of the optical model, preequilibrium (PE) statistical theory based on the exciton model, and the evaporation model. In the first, second, and third particle emitting processes, we consider preequilibrium emission and evaporation, in the fourth and fifth particle emitting processes, we only consider evaporation. In the evaporation model, the fission probability of the compound nucleus is calculated by the effect of the single peak fission barrier formula. For composite particle emission, the pick-up mechanism of cluster formation was used in the first particle emitting process.
In the energy range up to 33 MeV, CFUP1 can give the calculated results for optical model quantities and many kinds of cross sections in first, second, third, fourth, and fifth particle emitting processes as well as secondary particle and fission neutron energy spectra.
   The output data of CFUP1 include:
  1) The cross sections and nu values:
tot (only for neutron as projectile), el (only for neutron as projectile), non, (x,gamma), (x,n), (x,2n), (x,3n), (x,4n), (x,5n),  (x,np), (x,p), (x,d), (x,t), (x,He3), (x,alpha), (x,f), (x,n'f), (x,2nf), (x,3nf), (x,4nf), (x,pf), (x,f) (total fission cross section).
The nu values of various fission processes are also given.
2) The elastic scattering angular distributions and the ratios of the elastic scattering differential cross section to Rutherford scattering differential cross section.
3) The energy spectra of all secondary particles in one- to five- particle emission processes and the fission neutron spectra of various fission processes.
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4. METHOD OF SOLUTION

The radial wave function in the optical model is solved by the Neumanove method and double precision arithmetic is used. The step length is 0.25 fm and the step number is 61 in solving the radial equation. The Gaussian ten point numerical integration method is used.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

  1) The calculations are restricted to the fissile nuclei.
2) The incident particle is restricted to n(neutron), p(proton),      d(deuteron), alpha(helium-4), t(triton), and He3(helium-3).
3) The energy range of the incident particle is restricted to  below 33 MeV. In this region the maximum number of energy      points is 40.
4) The maximum number of energy points in emitting particle      spectra is 100.
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6. TYPICAL RUNNING TIME

The running time depends on the number of energy points for the calculation of cross sections and energy spectra, respectively. For example, calculation of all reaction cross sections in 29 incident energy points (5 to 33 MeV) and of energy spectra at 3 energy points (9 MeV, 26 MeV, and 33 MeV) for target nucleus U-235 with proton as incoming particle takes 74 minutes CPU time on a MICROVAX-II computer.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS:  FUP1 and CMUP2.
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9. STATUS
Package ID Status date Status
IAEA1266/01 12-APR-2001 Masterfiled Arrived
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10. REFERENCES

- M. Bohning:
Nucl. Phys., A152, 529(1970).
- F.C. Williams:
Nucl. Phys., A166, 231(1971).
- C. Kalbach:
in Proc. IAEA Advisory Group Meeting on Basic and Applied Problem
of Nuclear Level Densities
FS M.R. Bhat (Ed.), report BNL-NCS-51694 (Brookhaven National
Laboratory, 1983) p. 113.
- Zhang Jing-Shang and Yang Xian-Jun:
High Energy Physics and Nuclear Physics (China), 13, 822 (1989).
- R.J. Howerton:
Nucl. Sci. Eng., 62, 438(1977).
- A. Iwamoto and K. Harada:
Phys. Rev, C26, 1821(1982).
- K. Sato, A. Iwamoto and K. Harada:
Phys. Rev, C28, 1527(1983).
- Zhang Jing-Shang, Wen Yuan-Qi, Wang Shu-Nuan and Shi Xiang-Jun:
Commun. in Theor. Phys., (Beijing, China), 10, 33(1988).
- A. Gilbert and C.G.W. Cameron:
Can. J. Phys., 43, 1446(1965).
- F.D. Becchetti and G.W. Greenlees:
Phys. Rev., 182, 1190(1969).
- C.M. Perey et al.:
Atomic Data and Nuclear Data Tables, 17, 3(1976).
- Shen Qingbiao et al.:
Nuclear Data for Science and Technology, Proc. Int. Conf.,
Antwerp, 6-10 Sep., p. 565 (1982).
- R.L. Varner et al.:
Phys. Lett., B15, 6(1987).
- A.R. Barnett et al.:
Computer Phys. Commun., 8, 377(1974).
IAEA1266/01, included references:
- Cai Chong-Hai and Shen Qing-Biao:
  The User's Manual for Program CFUP1
- Zhuang Youxiang and Sun Zuxun:
  Communication of Nuclear Data Progress
  III Data Evaluation - Techniques used for Charged Particle Nuclear
  Data Evaluation at CNDC
  CNDC-0012, No.9, pp. 33-42 (1993).
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11. MACHINE REQUIREMENTS:  A printer is necessary for output.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
IAEA1266/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

FACOM OS IV/F4 on M-340S computer.
VAX/VMS V4.7 in MICRO VAX-II computer.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

1) Double precision arithmetic is necessary.
2) The unit number is 5 for input and 6 for output.
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15. NAME AND ESTABLISHMENT OF AUTHORS

Cai Chong-hai
Department of Physics
Nankai University
Tianjin, R.P. China

Shen Qing-biao
China Institute of Atomic Energy
Beijing, R.P. China
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16. MATERIAL AVAILABLE
IAEA1266/01
source program   mag tapeCFUP1 Source Program                       SRCTP
test-case data   mag tapeCFUP1 Input Data                           DATTP
test-case output mag tapeCFUP1 Output Data                          OUTTP
miscellaneous    mag tapeCFUP1 Abstract File                        MISTP
report                   User's Manual for Program CFUP1            REPPT
report                   CNDC-0012, No.9,  pp.33-42 (1993)          REPPT
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17. CATEGORIES
  • A. Cross Section and Resonance Integral Calculations

Keywords: charged particles, cross sections, emission spectra, evaporation model, fission spectra, optical models, precompound-nucleus emission.