Self-consistent calculations of electron-capture decays in Z=118, 119, and 120 superheavy isotopes

Abstract

Weak decays in superheavy nuclei with proton numbers Z = 118 - 120 and neutron numbers N = 175 - 184 are studied within a microscopic formalism based on deformed self-consistent Skyrme Hartree-Fock mean-field calculations with pairing correlations. The half-lives of beta+ decay and electron capture are compared with alpha-decay half-lives obtained from phenomenological formulas. The sensitivity of the half-lives to the unknown Q-energies is studied by comparing the results obtained from different approaches for the masses. It is shown that alpha-decay is always dominant in this mass region. The competition between alpha and beta+/EC decay modes is studied in seven alpha-decay chains starting at different isotopes of Z=118, 119, and 120.

8 pages, 5 figures. arXiv admin note: text overlap with arXiv:2009.02103

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Cited by in corpus (4)

• Decay of superheavy nuclei based on the random forest algorithm
• Competition between weak and alpha-decay modes in superheavy nuclei
• Decay properties of undetected superheavy nuclei with Z>110
• Deformed magic numbers at $N=$178 and $Z=$120, 124 in the 112 $\le N\le$ 190 superheavy region from Skyrme mean-field calculations