The Shape and Potential of Hot Nuclei in Symmetry Ternary Fission

DAI Guang-Xi

Chinese Physics C> 1992, Vol. 16> Issue(7) : 651-657

The Shape and Potential of Hot Nuclei in Symmetry Ternary Fission

DAI Guang-Xi ^,

Institute of Modern Physics,Academia Sinica,Lanzhou 730000

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Abstract：
A symmetry ternary fission (STF) shape with a spherical residue plus 3 rose-leaf-like rotating bodies (SRRL) has been proposed to describe the large deformation process from sphere to scission point with one deformation paramenter.By LDM,the relative Coulomb and surface potential with sharp surface have been calculated; as a example in several nuclei we present STF collective potentials,from which the shape and barrier height in saddle point and TKE determined by coulomb energy in scission are given.Also the shift of C.M.for each prefragment in STF process and the deformation energy for new born fragment are obtained.Considering the dependence of nuclear surface tension on nuclear temperature,the STF barrier height for hot nuclei would be decreased and then the STF probabilities over the barrier would increase too.The calculated results in the SRRL have been compared with previous results by oblate shape model.

References

[1]

金今和张云鄂，中国大百科全书，物理学，II卷，853页，(1987.7).[2] W. J. Swiatecki, et al., Second UN Intern. Conf. on the Peaceful Uses of Atomic Energy(Geneva, 1958) vol. 15, p. 248,[3] P, Schall, P. Heeg, et al., Phys. Lett., 191(1987), 339.[4] V, P. Perelygin, et al., Nucl. Phys., A127(1969),577.[5] H. Diehl and W. Greiner, Nucl. Phys A229(1974), 29.[6] 戴光曦，刘希明和刘国兴，高能物理与核物理，11(1987)，515, G. Dai, X. Liu and G. Liu, Chinese Phys.,8(1988),427.[7] 戴光曦和李伟生，高能物理与核物理，12(1988)， 669. Dai Guanggi and Li Weisheng, High Energ.Phys and Nucl. Phys., 12(1988)399.[8] V.S. Stavinsky, et al., Nucl. Phys.(USSR), 71(1968), 1051.[9] S. Levit, Nucl. Phys., A437(1985),426.

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DAI Guang-Xi. The Shape and Potential of Hot Nuclei in Symmetry Ternary Fission[J]. Chinese Physics C, 1992, 16(7): 651-657.

DAI Guang-Xi. The Shape and Potential of Hot Nuclei in Symmetry Ternary Fission[J]. Chinese Physics C, 1992, 16(7): 651-657. shu

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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

The Shape and Potential of Hot Nuclei in Symmetry Ternary Fission

DAI Guang-Xi ^,

Corresponding author: DAI Guang-Xi,

Institute of Modern Physics,Academia Sinica,Lanzhou 730000

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1992-07-05

Abstract: A symmetry ternary fission (STF) shape with a spherical residue plus 3 rose-leaf-like rotating bodies (SRRL) has been proposed to describe the large deformation process from sphere to scission point with one deformation paramenter.By LDM,the relative Coulomb and surface potential with sharp surface have been calculated; as a example in several nuclei we present STF collective potentials,from which the shape and barrier height in saddle point and TKE determined by coulomb energy in scission are given.Also the shift of C.M.for each prefragment in STF process and the deformation energy for new born fragment are obtained.Considering the dependence of nuclear surface tension on nuclear temperature,the STF barrier height for hot nuclei would be decreased and then the STF probabilities over the barrier would increase too.The calculated results in the SRRL have been compared with previous results by oblate shape model.