Alpha-decay half-lives and Q_alpha values of superheavy nuclei

Details Alpha-decay half-lives and Q_alpha values of superheavy nuclei Alpha-decay half-lives and Q_alpha values of superheavy nuclei

2010-04-14

arxiv.org/abs/1004.2309v1

Phys.Rev.C81:064309,2010

Physics

Nuclear Physics

Nuclear Theory

7 pages, 3 figures

Scientific paper

10.1103/PhysRevC.81.064309

The alpha-decay half-lives of recently synthesized superheavy nuclei (SHN) are investigated based on 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 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 suggested 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. With Q_alpha values from this formula as inputs, we predict the half-lives of isotopes of Z = 117, which may be useful for experimental identication in the future.

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