DECAY PROPERTIES AND STABILITY OF HEAVIEST ELEMENTS

作者：Karpov A V^*; Zagrebaev V I; Palenzuela Y Martinez; Ruiz L Felipe; Greiner Walter

来源：International Journal of Modern Physics E-Nuclear Physics, 2012, 21(2): 1250013.

DOI：10.1142/S0218301312500139

• Superheavy nuclei
• decay modes
• half-lives
• alpha-decay
• beta-decay
• spontaneous fission

Deca properties and stability of heaviest nuclei with Z %26lt;= 132 are studied within the macro-microscopical approach for nuclear ground state masses and phenomenological relations for the half-lives with respect to alpha-decay, beta-decay and spontaneous fission. We found that at existing experimental facilities the synthesis and detection of nuclei with Z %26gt; 120 produced in fusion reactions may be difficult due to their short half-lives (shorter than 1 mu s). The nearest (more neutron-rich) isotopes of superheavy elements with 111 %26lt;= Z %26lt;= 115 to those synthesized recently in Dubna in Ca-48-induced fusion reactions are found to be beta(+)-decaying. This fact may significantly complicate their experimental identification. However it gives a chance to synthesize in fusion reactions the most stable superheavy nuclei located at the center of the island of stability. Our calculations yield that the beta-stable isotopes (291)Cn and (293)Cn with a half-life of about 100 years are the longest-living superheavy nuclei located at the island of stability.

• 出版日期2012-2