ALPHA DECAY AND STRUCTURE OF KPI=O+ STATES IN TH-U REGION

The influence of the long-range effective forces on alpha decay to first Kπ = 0+ states of boundary nuclei 232U, 230Th and 228Th is analysed. It is shown that only the model with pairing, quadrupole and spin-quadrupole effective forces can describe both the energies and the alpha hindrance factors for β-states (Kπ = 0+) in this region. From the experimental data, the strength parameters for quadrupole and spin-quadrupole forces are determined. © 1969.