Study on the α-Decay Lifetimes of Superheavy Elements

XU Chang; REN Zhong-Zhou

Chinese Physics C> 2003, Vol. 27> Issue(12) : 1089-1094

Study on the α-Decay Lifetimes of Superheavy Elements

XU Chang ,
REN Zhong-Zhou ^,

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：
The α-decay lifetimes of the newly synthesized superheavy elements are calculated using the α-cluster model and the results are in good agreement with experimental data. This indicates the reliability of the α-cluster model. The theoretical lifetimes based on the Hartree-Fock nuclear mass table are also calculated, which are useful for further theoretical and experimental researches on superheavy nuclei. We have also analyzed the α-decay energies, the separation energies of the last two neutrons and the separation energies of the last two protons of the superheavy nuclei. The shell effect at Z=114 and N=184 is discussed.

References

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. Hofmann S et al.Z .Phys.,1995,A350:2772. Hofmann S et al.Z .Phys.,1995,A350:281 3. Hofmann et al.Z .Phys.,1996,A354:2294. Hofmann S et al.Euro.Phys.J.,2001,A10:55. Hofmann S .Rep.Prog.Phys.,1998,61:6396. Oganessian Yu Ts et al.Nature,1999,400:2427. Oganessian Yu Ts et al.Phys.Rev.,Lett.,1999,83:31548. Oganessian Yu Ts et al.Phys.Rev.,2001,C63:011301(R)9. Oganessian Yu Ts et al.Phys.Rev.,2000,C62:041604(R)10. GAN Z G ,QIN Z ,FAN H M et al.Eur.Phys.J.,2001,A10:2111. REN Zhong-Zhou,XU Gong-Ou.Phys.Rev.,1987,C36:45612. REN Zhong-Zhou,XU Gong-Ou.Phys.Rev.,1988,C38:107813. REN Zhong-Zhou,XU Gong-Ou.J.Phys.,1989,G15:46514. Buck B ,Merchant A C .Atomic Data and Nuclear Data Table.,1993,54:5315. Goriely S ,Tondeur F ,Pearson J M .Atomic Data and Nuclear Data Table,2001,77:31116. Dullmann ch E et al.Nature.,2002,V418:859 17. Wilk P A et al.Phys.Rev.Lett.,2000,85:269718. Audi G et al.Nucl.Phys.,1997,A624:1 19. Audi G ,Wapstra.Nucl.Phys.,1993,A565:1

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XU Chang and REN Zhong-Zhou. Study on the α-Decay Lifetimes of Superheavy Elements[J]. Chinese Physics C, 2003, 27(12): 1089-1094.

XU Chang and REN Zhong-Zhou. Study on the α-Decay Lifetimes of Superheavy Elements[J]. Chinese Physics C, 2003, 27(12): 1089-1094. shu

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Received: 2003-04-21
Revised: 1900-01-01

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Study on the α-Decay Lifetimes of Superheavy Elements

XU Chang
REN Zhong-Zhou ^,

Corresponding author: REN Zhong-Zhou,

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

Received Date: 2003-04-21
Accepted Date: 1900-01-01
Available Online: 2003-12-05

Abstract: The α-decay lifetimes of the newly synthesized superheavy elements are calculated using the α-cluster model and the results are in good agreement with experimental data. This indicates the reliability of the α-cluster model. The theoretical lifetimes based on the Hartree-Fock nuclear mass table are also calculated, which are useful for further theoretical and experimental researches on superheavy nuclei. We have also analyzed the α-decay energies, the separation energies of the last two neutrons and the separation energies of the last two protons of the superheavy nuclei. The shell effect at Z=114 and N=184 is discussed.