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Chin. Phys. B, 2009, Vol. 18(9): 3810-3814    DOI: 10.1088/1674-1056/18/9/032
NUCLEAR PHYSICS Prev   Next  

$\alpha$ preformation and penetration probability for heavy nuclei

Zhang Gao-Long(张高龙) and Le Xiao-Yun(乐小云)
School of Physics and Nuclear Energy Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
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.
Keywords:  preformation factor      penetration probability      magic number  
Received:  29 December 2008      Revised:  23 February 2009      Accepted manuscript online: 
PACS:  23.60.+e (α-decay)  
  21.60.Cs (Shell model)  
  24.10.Ht (Optical and diffraction models)  
  27.80.+w (190 ≤ A ≤ 219)  
  27.90.+b (A ≥ 220)  
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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