Abstract The $\alpha$ preformation factor and penetration probability have been analyzed for even--even nuclei of Po, Rn, Ra using experimental released energies and α decay half-lives in the frame of the double folding model. It is shown that N=126 is a neutron magic number from $\alpha$ preformation and shell effects play an important role in $\alpha$ preformation. The closer the nucleon number is to the magic number, the more difficult $\alpha$ formation in the parent nucleus is. The preformation factor can supply information on the nuclear structure and the penetration probability mainly determines $\alpha$ decay half-life.
Received: 29 December 2008
Revised: 23 February 2009
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 60572177).
Cite this article:
Zhang Gao-Long(张高龙) and Le Xiao-Yun(乐小云) $\alpha$ preformation and penetration probability for heavy nuclei 2009 Chin. Phys. B 18 3810
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