Alpha decay of nuclei interesting for synthesis of Z=119, 120 isotopes

2017/06/10 by Poenaru, D. N., Gherghescu, R. A.
#FOS: Physical sciences #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.1706.04068

Abstract

Four groups (even-even, even-odd, odd-even and odd-odd) of heavy and super-heavy nuclei are of interest for the synthesis of the isotopes with Z=119, 120. We report calculations of α~decay half-lives using four models: AKRA (Akrawy); ASAF (Analytical Super-Asymmetric Fission); UNIV (Universal Formula), and semFIS (Semi-empirical formula based on Fission Theory). We compare the experimental Q_α values either with AME16 atomic mass evaluation (whenever available) and with the theoretical model WS4, able to give masses of not yet measured nuclides. For ^92,94Sr cluster radioactivity of ^300,302120 we predict a branching ratio relative to α~decay of -0.10 and 0.49, respectively, meaning that it is worth trying to detect such kind of decay modes in competition with α~decay.

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