alpha-decay half-lives and Q(alpha) values of superheavy nuclei


Autoria(s): Dong, JM; Zuo, W; Gu, JZ; Wang, YZ; Peng, BB
Data(s)

2010

Resumo

The alpha-decay half-lives of recently synthesized superheavy nuclei (SHN) are investigated by employing a unified fission model (UFM) where a new method to calculate the assault frequency of alpha emission is used. The excellent agreement with the experimental data indicates the UFM is a useful tool to investigate these alpha decays. It is found that the alpha-decay half-lives become more and more insensitive to the Q(alpha) values as the atomic number increases on the whole, which is favorable for us to predict the half-lives of SHN. In addition, a formula is proposed to compute the Q(alpha) values for the nuclei with Z >= 92 and N >= 140 with a good accuracy, according to which the long-lived SHN should be neutron rich. Several weeks ago, two isotopes of a new element with atomic number Z = 117 were synthesized and their alpha-decay chains have been observed. The Q(alpha) formula is found to work well for these nuclei, confirming its predictive power. The experimental half-lives are well reproduced by employing the UFM with the experimental Q(alpha) values. This fact that the experimental half-lives are compatible with experimental Q(alpha) values supports the synthesis of a new element 117 and the experimental measurements to a certain extent.

Identificador

http://ir.impcas.ac.cn/handle/113462/7877

http://www.irgrid.ac.cn/handle/1471x/133015

Idioma(s)

英语

Fonte

Dong, JM; Zuo, W; Gu, JZ; Wang, YZ; Peng, BB.alpha-decay half-lives and Q(alpha) values of superheavy nuclei,PHYSICAL REVIEW C,2010,81(6):64309

Palavras-Chave #HEAVIEST ELEMENTS #EMISSION #RADIOACTIVITY #STABILITY #ISLAND #HEAVY
Tipo

期刊论文