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IAEA1265 CMUP2.

CMUP2, Reaction Cross-Sections for N, P, D, T, He3, He4 up to 50 MeV

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1. NAME OR DESIGNATION OF PROGRAM:  CMUP2
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2. COMPUTERS
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Program name Package id Status Status date
CMUP2 IAEA1265/01 Tested 17-MAY-1995

Machines used:

Package ID Orig. computer Test computer
IAEA1265/01 Many Computers DEC VAX 6000
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3. DESCRIPTION OF PROGRAM OR FUNCTION

CMUP2 is a program for calculating the neutron or charged particles (p, d, t, He3, alpha) induced reactions of medium-heavy nuclei in the incident energy range up to 50 MeV.

CMUP2 is constructed within the framework of 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 particle emitting process, we only consider evaporation. For composite particle emission, the pick-up mechanism of cluster formation was used in the first, second, and third particle emitting processes.

In the energy range up to 50 MeV, CMPU2 can give the calculated results for optical model quantities and all kinds of cross sections in first, second, third, and fourth particle emitting processes. When the incident energy is near 50 MeV, the fourth particle emitting process includes the contributions of the fifth particle emitting process for heavier nuclei. CMUP2 also gives energy spectra of all emitted particles in first and second particle emitting processes.

The output data of CMUP2 include: total and shape elastic scattering cross sections (only for neutron as projectile); total reaction cross section; radiative capture cross section; (x, x') reaction cross sections, (x, x1x2) reaction cross sections, and (x, x1x2x3) reaction cross sections, where x', x1, x2, and x3 may be n, p, t, He3, d, or alpha; (x, x1x2x3x4) reaction cross sections, where x1 and x2 can be n, p, t, He3, d, or alpha, but x3 and x4 can only be n or p; the elastic scattering angular distribution and the ratio of the elastic scattering differential cross section to the Rutherford differential cross section; the energy spectra of x' particle in (x, x') reaction and of x1 and x2 particles in (x, x1x2) reaction.

In order to make convenient comparison with experimental data we also give the sum of cross sections of all reactions which lead to the same residual nucleus, for example, S(x,2np)+S(x,nd)+S(x,t). We call them yield cross sections.

In CMUP2, we give the emission cross section of particle y in reaction (x, yx') in one- and two-particle emission processes without regard to what particle x' is and the corresponding energy spectra of particle y in reaction (x, yx'), where y can be n, p, t, He3, d, or alpha. We also give the total emission cross section of particle y in reaction (x, yx') in one-, two-, three-, and four- particle emission processes without regard to what particles x' are and the corresponding multiplicity of particle y in reaction (x, yx'), where y can be n, p, t, He3, d, or alpha.
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4. METHOD OF SOLUTION

The radial wave function in the optical model is solved by the Neumanove method. Double precision arithmetic is used. The step length is 0.1 fm and the step number is 150 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 medium-heavy nuclei, for which fission reactions are absent.
2) The incident particle is restricted to n(neutron), p(proton), d(deuteron), alpha(helium-4), t(triton), and He2(helium-3). The outgoing particles only include n(neutron) and the above five charged particles as well as gammas.
3) The energy range of incident particles is restricted to below 50 MeV. In this region the maximum number of energy points is 40.
4) The maximum number of energy points in emitting particle spectra is 50.
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6. TYPICAL RUNNING TIME

The running time depends on the isotope number of the target nucleus and the energy points for calculation of cross sections and energy spectra, respectively. For example, calculation of all reaction cross sections in 22 incident energy points (6 to 40 MeV) and of energy spectra at 2 energy points (14 MeV and 30 MeV) for target nucleus Mn-55 with alpha as incoming particle takes 70 minutes CPU time on M-340S computer.
IAEA1265/01
NEA-DB ran the test case included in this package on a  DEC VAX 6000 in 3 minutes of CPU time.
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7. UNUSUAL FEATURES
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8. RELATED AND AUXILIARY PROGRAMS:  CMUP and MUP2
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9. STATUS
Package ID Status date Status
IAEA1265/01 17-MAY-1995 Tested at NEADB
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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).
- 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., B185, 6(1987).
- A.R. Barnett et al.:
  Computer Phys. Commun., 8, 377(1974).
IAEA1265/01, included references:
- Cai Chong-Hai and Shen Qing-Biao:
The User's Manual for Program CMUP2
- 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:  3072K bytes of memory.
IAEA1265/01
The program was implemented and the test case run by NEA-DB on a DEC VAX 6000-510 computer.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
IAEA1265/01 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 on MICRO VAX-II computer.
IAEA1265/01
The program was compiled and executed under VAX/VMS version 6.1. The VAX Fortran-77 compiler version 6.2 was used.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

1) Double precision arithmetic is necessary.
2) 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
IAEA1265/01
File name File description Records
IAEA1265_01.001 Information file 80
IAEA1265_01.002 Fortran Source code 6228
IAEA1265_01.003 Input data 83
IAEA1265_01.004 Output data 1847
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17. CATEGORIES
  • A. Cross Section and Resonance Integral Calculations

Keywords: charged particles, cross sections, evaporation model, optical models.