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 N D = 136, due to the corresponding increasing Q α (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.