CALCULATION OF THE KINETIC-ENERGY DISTRIBUTIONS OF FISSION-FRAGMENTS FROM MONTE-CARLO SIMULATION TO THE FOUR-DIMENSIONAL LANGEVIN EQUATION

BAO Jing-Dong; ZHU Yi-Zhong

Chinese Physics C> 1989, Vol. 13> Issue(11) : 1023-1031

CALCULATION OF THE KINETIC-ENERGY DISTRIBUTIONS OF FISSION-FRAGMENTS FROM MONTE-CARLO SIMULATION TO THE FOUR-DIMENSIONAL LANGEVIN EQUATION

BAO Jing-Dong ^, ,
ZHU Yi-Zhong

Institute of Atomic Energy Beijing

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Abstract：
The four-dimensional Langevin equation for two collective coordinates (the distance bet ween the centers of mass of the dascent fragments and the neck parameter) and their conjugate momenta is used as a dynamical equation to describe the descent of Brownian particles from the saddle-point to the scission points Monte-carlo method is used to slove the Langevin equation.The variances of the kinetic-energy distributions of nuclear fission-fragments in the range 322/A<40 have been calculated.The results of calculation are in good agreement with the experimental data.

References

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F. Scheuter, C. Gegoire, H. Hofmann and J. R. Nix. phys. Lett., 149B(1984), 303.[2] G. D. Adeev and I. I. Gonchar, Z. Phys., A332(1985), 479.[3] Sezdyuk O. I., Adeev G. D., Gonchar I. I., Pashkevich V. V., and Pischasov N. I., Yod. Fiz (USSR), 46(1987), 710.[4] H. Hofrnann, C. Grepoire, R. Luces and C. Ngo, Z. Phys., A293(1979), 229.[5] G. D. Adeev and I. 1. Gonchar, Sou. J. Nwcl. phys., 40(1984), 553[6] S . Chandrasekhar, Rev. Mod. Phys., 15(1943), 1.[7] Brack M., Damgaard J., Jensen A. S., PauIi H. C.Strulsky V. M.. Wong C. Y.. Rev. Mod. Phys.. 44(1972), 320.[8] F. Scheuter and H. Hofmann, Nucl. phys., A394(1983), 477.[9] Lazarev Y. A., A;. Energy. Rev, 15(1977), 75.[10] K. T. R. Davis and A. J. Sierk, .I. Comp. phys., 18(1975), 311.

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BAO Jing-Dong and ZHU Yi-Zhong. CALCULATION OF THE KINETIC-ENERGY DISTRIBUTIONS OF FISSION-FRAGMENTS FROM MONTE-CARLO SIMULATION TO THE FOUR-DIMENSIONAL LANGEVIN EQUATION[J]. Chinese Physics C, 1989, 13(11): 1023-1031.

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

CALCULATION OF THE KINETIC-ENERGY DISTRIBUTIONS OF FISSION-FRAGMENTS FROM MONTE-CARLO SIMULATION TO THE FOUR-DIMENSIONAL LANGEVIN EQUATION

BAO Jing-Dong ^,
ZHU Yi-Zhong

Corresponding author: BAO Jing-Dong,

Institute of Atomic Energy Beijing

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1989-11-15

Abstract: The four-dimensional Langevin equation for two collective coordinates (the distance bet ween the centers of mass of the dascent fragments and the neck parameter) and their conjugate momenta is used as a dynamical equation to describe the descent of Brownian particles from the saddle-point to the scission points Monte-carlo method is used to slove the Langevin equation.The variances of the kinetic-energy distributions of nuclear fission-fragments in the range 322/A<40 have been calculated.The results of calculation are in good agreement with the experimental data.