New Formula for Spontaneous Fission Half-lives of Heavy Nuclei

XU Chang; REN Zhong-Zhou; WANG Zai-Jun

Chinese Physics C> 2005, Vol. 29> Issue(7) : 673-676

New Formula for Spontaneous Fission Half-lives of Heavy Nuclei

Department of Physics, Nanjing University,Nanjing 210008,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy-Ion Accelerator,Lanzhou 730000,China

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Abstract：
Systematic calculations on spontaneous fission half-lives of heavy nuclei are carried out by Swiatecki's formula with renewed parameters and by its generalized form. A new formula with only four parameters is also proposed for spontaneous fission half-lives.Experimental half-lives are well reproduced by the three formulae. We have found from systematics of available data that there is a long lifetime line of spontaneous fission N=Z+52 for heavy elements with Z≥90. The new formula can be used to predict the spontaneous fission half-lives of heavy nuclei not far away from this long lifetime line.

References

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XU Chang, REN Zhong-Zhou and WANG Zai-Jun. New Formula for Spontaneous Fission Half-lives of Heavy Nuclei[J]. Chinese Physics C, 2005, 29(7): 673-676.

XU Chang, REN Zhong-Zhou and WANG Zai-Jun. New Formula for Spontaneous Fission Half-lives of Heavy Nuclei[J]. Chinese Physics C, 2005, 29(7): 673-676. shu

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Received: 2004-11-12
Revised: 1900-01-01

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