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Keywords:

alpha decay, shape coexistence, Science & Technology, Physical Sciences, Physics, Atomic, Molecular & Chemical, Physics, Condensed Matter, Physics, Nuclear, Physics, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, 0204 Condensed Matter Physics, General Physics, 5102 Atomic, molecular and optical physics, 5104 Condensed matter physics, 5106 Nuclear and plasma physics

Abstract:

The transition rates of DeltaL = 0 alpha transitions in them lightest Po isotopes are considerably slower than the transition rates of the heavier ones, even leading to a considerable deviation in the classical Geiger-Nuttall plot. Evidence will be given that due to particle-hole excitations through the Z = 82 proton shell, the groundstate of the lighter Po isotopes becomes deformed and direct alpha decay to the spherical groundstate of the corresponding Ph isotopes is highly retarded.