Chinese Physics C > 1982, Vol. 6 > Issue(4): 466-471

QUASI-THERMODYNAMIC THEORY ON FISSION CHARGE DISTRIBUTION

WANG CHENG-SHING

Department of Technical Physics, Peking University

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Abstract：
Assuming fission fragments are in statistical equilibrium state at scission point,we can consider the particle number distributions of fission fragments as the fluctua-tions around some average values. and treat them by means of quasi-thermodynamicmethod. The main result is that all distributions of mass number, charge number,isotopes and elements are Gaussian distributions around some average values andwith constant variances, and that all relevant parameters depend on temperature andproperties of fragments near the most probable fission mode only. We have determinedthe values of five fundamental parameters for the case of ²³⁵U(11th, f) according tothe experimental data, and use them to calculate the other parameters. The agree-ment between theory and experiment is satisfactory.

References

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P. Fong, Phys, Rev., 102(1956), 434.[2] 王正行,高能物理与核物理 2(1982).[3] 王竹溪,《统计物理学导论》,人民教育出版社,1978年,北京[4] K.F.Flynn and L.E.Glendenin,ANL-7749,1970.[5] S. Amiel and H. Feldstein, Phys. Rev., C11(1975), 845.[6] A. C. Wahl, R. L. Ferguson, D. R. Nethaway, D. E. Troutner and H. Wolfaberg, Phys. Rev.,126(1962), 1112.[7] R. Vandenboech and J.. R. Huizenga "Nuclear Fission",Academic Prese, 1973, New York.[8] A. C. Pappas, Proc. Int. Conf. Peaceful Uses of Atomie Energy, Genneva. 1955, Vol. 7, pp. 19-26, Nations, New York.[9] 王正行, 于相杰, 黄森, 《铀杯中子裂变质量分布的一个经脸公式》北京大学内那报告,1977年.

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WANG CHENG-SHING. QUASI-THERMODYNAMIC THEORY ON FISSION CHARGE DISTRIBUTION[J]. Chinese Physics C, 1982, 6(4): 466-471.

WANG CHENG-SHING. QUASI-THERMODYNAMIC THEORY ON FISSION CHARGE DISTRIBUTION[J]. Chinese Physics C, 1982, 6(4): 466-471. shu

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Received: 1981-11-23
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

QUASI-THERMODYNAMIC THEORY ON FISSION CHARGE DISTRIBUTION

WANG CHENG-SHING

Department of Technical Physics, Peking University

Received Date:1981-11-23
Accepted Date:1900-01-01
Available Online:1982-08-05

Abstract:Assuming fission fragments are in statistical equilibrium state at scission point,we can consider the particle number distributions of fission fragments as the fluctua-tions around some average values. and treat them by means of quasi-thermodynamicmethod. The main result is that all distributions of mass number, charge number,isotopes and elements are Gaussian distributions around some average values andwith constant variances, and that all relevant parameters depend on temperature andproperties of fragments near the most probable fission mode only. We have determinedthe values of five fundamental parameters for the case of²³⁵U(11th, f) according tothe experimental data, and use them to calculate the other parameters. The agree-ment between theory and experiment is satisfactory.