α-decays of even–even actinides and superheavy nuclei to the first rotational 2⁺ states of daughter nuclei

Abstract

The alpha-decays of even-even isotopes of actinides and superheavy nuclei to the ground 0+ and first 2+ states of their daughter nuclei are studied. The conditions for the maximum intensity of alpha-decay from the ground state to the lowest 2+ state are analyzed in detail based on existing experimental data. The decays to the first 2+ states reach their maximum intensity relative to those to corresponding ground states of daughter nuclei at ND = 136, due to the corresponding increasing Qα(2+). This correlates with relatively strong negative octupole deformation of daughter nucleus and is also accompanied by decreasing E(2+). For the alpha-decays of heavy nuclei up to Og, the half-lives and population probabilities of the 0+ and 2+ states of the daughter nucleus are described and predicted employing the preformed cluster model.