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

Abstract

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.

7 pages, 3 figures

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Cited by in corpus (8)

• Mirror nuclei constraint in mass formula
• Relativistic mean field study of the properties of Z=117 nucleus and the decay chains of ${}^{293,294}$117 isotopes
• Proton radioactivity described by covariant density functional theory with Similarity Renormalization Group method
• Three-body force effect on nucleon momentum distributions in asymmetric nuclear matter within the framework of the extended BHF approach
• Origin of symmetry energy in finite nuclei and density dependence of nuclear matter symmetry energy from measured alpha-decay energies
• Systematic study of proton radioactivity based on Gamow--like model with a screened electrostatic barrier
• Systematic study of $\alpha$ decay half-lives based on Gamow--like model with a screened electrostatic barrier
• Nuclear energy density functional and the nuclear alpha decay