New calculations of α-decay half-lives by the Viola-Seaborg formula
Department of Physics, Nanjing University, 210008, Nanjing, PRC
2 Center of Theoretical Nuclear Physics, National Laboratory of Heavy-Ion Accelerator, 730000, Lanzhou, PRC
Accepted: 11 August 2005
Published online: 21 September 2005
The Viola-Seaborg formula is a well-known formula for α-decay half-lives of heavy nuclei. In this work we obtain new parameters of this formula through a least-square fit to even-even nuclei between Z = 84 and Z = 110 with N greater than 126. On average, the formula can reproduce the half-lives of heavy even-even nuclei within a factor of 1.3. The formula with new parameters works well for the superheavy region which is a hot topic of nuclear physics. The numerical results from the formula are compared with those from the cluster model.
PACS: 27.90.+b A ≥ 220 – / 23.60.+e Alpha decay – / 21.10.Tg Lifetimes –
© Società Italiana di Fisica and Springer-Verlag, 2005