科研之友
微信
新浪微博
Facebook
分享链接
摘要
We investigate the recently discovered a decays of heavy and superheavy nuclei with A = 160-294 by the cluster model of a decay. This covers the short-lifetime a decays of the nuclei near the proton-drip line, the decays of superheavy elements with Z = 106-118, and the long-lifetime decay of the naturally occurring nuclide W-180 [Danevich et al., Phys. Rev. C 67, 014310 (2003)]. It is found that the cluster model can well reproduce the new data of half-lives of these nuclei. For superheavy nuclei the cluster model, without introducing any additional adjustments, can reasonably reproduce the half-lives of many nuclei although substantial deviations between experimental half-lives and theoretical ones exist in a few cases in which there may be large errors in the experimental data for a single event. Some new a emitters in naturally occurring nuclides are predicted. Experiments to search the alpha radioactivity of Hf-176,Hf-178 and of Sm-149 are strongly recommended.
- 出版日期2004-2
- 单位南京大学
