Chinese Physics C > 1978, Vol. 2 > Issue(4): 350-349

THE MICROSCOPIC CALCULATION OF THE STATISTICAL THEORY OF NUCLEAR FISSION

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Abstract：
Based on the statistical fission theory, we have calculated the mass and kinetic energy distributions as well as other physical quantities of ²³⁵U fission induced by thermal neutron using microscopical method. That is, the quantum state densities of the fragments at scission point are calculated by means of BCS hamiltonian. The contribution of the collective deformation of fragments to the quantum state density has been taken into consideration. The potential energy of fragment is calculated by means of Strutinski procedure, and the shelling effect, pairing correlation as well as collective deformation have been taken into consideration in calculating the excitation energy at scission point. The scission point distance is treated as an adjustable parameter.Comparing with other statistical fission theories, our results give better agreement with existing experiments.

References

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P. Forg, Phys. Rev., 102(1956), 434.[2] L. G. Moretto, Nucl. Phys., A182(1972), 641.[3] V. M. Strutinski, Nucl. Phys., A95(1967), 420.[4] F. Dickmann, K. Dietrich, Nucl. Phys., A129(1969), 241.[5] L. G. Moretto et al., Energia Nucleare, 17(1970), 436.[6] W. Meyers, W. J. Swiatecki, Nucl. Phys., 81(1966), 1.[7] H. Okamoto, et al., J. Phys. Soc. Japan., 30(1971), 927.[8] 陈仁烈，《统计物理引论》，(1961), 207.[9] A. Y. Abul-Magd, Phys. Rev., C5 (1972 ) , 599.[10] H. W. Schmitt et al., Phys. Rev., 141(1966), 1146.[11] H. Okamoto et al., J. Phys. Soc. Japan., 34(1973), 588.[12] T. Yamamoto et al., J. Nucl. Sci. Technol., 11(1974), 461.[13] R. Vandenbosch J. R. Huizenga, 'Nuclear Fission”，(1973).

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HE ZE-JUN and LEE PAN-LIN. THE MICROSCOPIC CALCULATION OF THE STATISTICAL THEORY OF NUCLEAR FISSION[J]. Chinese Physics C, 1978, 2(4): 350-349.

HE ZE-JUN and LEE PAN-LIN. THE MICROSCOPIC CALCULATION OF THE STATISTICAL THEORY OF NUCLEAR FISSION[J]. Chinese Physics C, 1978, 2(4): 350-349. shu

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Received: 1977-12-07
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

THE MICROSCOPIC CALCULATION OF THE STATISTICAL THEORY OF NUCLEAR FISSION

HE ZE-JUN
LEE PAN-LIN

Received Date:1977-12-07
Accepted Date:1900-01-01
Available Online:1978-08-05

Abstract:Based on the statistical fission theory, we have calculated the mass and kinetic energy distributions as well as other physical quantities of²³⁵U fission induced by thermal neutron using microscopical method. That is, the quantum state densities of the fragments at scission point are calculated by means of BCS hamiltonian. The contribution of the collective deformation of fragments to the quantum state density has been taken into consideration. The potential energy of fragment is calculated by means of Strutinski procedure, and the shelling effect, pairing correlation as well as collective deformation have been taken into consideration in calculating the excitation energy at scission point. The scission point distance is treated as an adjustable parameter.Comparing with other statistical fission theories, our results give better agreement with existing experiments.