engleski

Microscopic description of the self-conjugate ^108Xe and ^104Te α-decay chain

A microscopic calculation of half-lives for the recently observed 108Xe → 104Te → 100Sn α-decay chain is performed by using a self-consistent framework based on energy density functionals. The relativistic density functional DD-PC1 and a separable pairing interaction of finite range are used to compute axially symmetric deformation-energy surfaces of 104Te and 108Xe as functions of quadrupole, octupole, and hexadecupole collective coordinates. Dynamic least-action paths are determined that trace the α-particle emission from the equilibrium deformation to the point of scission. The calculated half-lives, 197 ns for 104Te and 50 μs for 108Xe, are compared with recent experimental values of the half-lives of superallowed α decay of 104Te: <18 ns, and 108Xe: 58+106 −23 μs.

energy density functionals

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