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Chin. Phys. B, 2009, Vol. 18(9): 03810    DOI: 10.1088/1674-1056/18/9/032

α preformation and penetration probability for heavy nuclei

Zhang Gao-Long, Le Xiao-Yun
School of Physics and Nuclear Energy Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
Abstract  The α 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 α preformation and shell effects play an important role in α preformation. The closer the nucleon number is to the magic number, the more difficult α formation in the parent nucleus is. The preformation factor can supply information on the nuclear structure and the penetration probability mainly determines α decay half-life.
Keywords:  magic number      penetration probability      preformation factor  
Received:  29 December 2008      Revised:  23 February 2009      Published:  20 September 2009
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, Le Xiao-Yun α preformation and penetration probability for heavy nuclei 2009 Chin. Phys. B 18 03810

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