Super - allowed α decay above doubly - magic 100 Sn and properties of 104 Te = 100 Sn ⊗ α

α-decay half-lives for Te and Xe close above the doubly-magic Sn are calculated from systematic double-folding potentials. The derived α preformation factors are compared to results for Po and Rn above the doubly-magic Pb. α-decay energies of Qα = 5.42 ± 0.07MeV and 4.65 ± 0.15MeV are predicted for Te and Xe; the corresponding half-lives are T1/2 ≈ 5 ns for Te and of the order of 60μs for Xe. Additionally, the properties of rotational bands in Te are analyzed, and the first excited 2 state in Te is predicted at Ex = 650± 40 keV; it decays preferentially by γ emission with a reduced transition strength of 10 Weisskopf units to the ground state of Te and with a minor branch by α emission to the ground state of Sn. PACS. 21.10.-k Properties of nuclei; nuclear energy levels – 21.10.Tg Lifetimes – 27.60.+j 90≤A≤149 – 21.60.Gx Cluster models