| Autor: |
Mercier F; IJCLab, Université Paris-Saclay, CNRS/IN2P3, 91405 Orsay Cedex, France., Zhao J; Center for Circuits and Systems, Peng Cheng Laboratory, Shenzhen 518055, China., Ebran JP; CEA, DAM, DIF, F-91297 Arpajon, France.; Université Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes, 91680 Bruyères-le-Châtel, France., Khan E; IJCLab, Université Paris-Saclay, CNRS/IN2P3, 91405 Orsay Cedex, France., Nikšić T; Physics Department, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia., Vretenar D; Physics Department, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia. |
| Abstrakt: |
A microscopic calculation of half-lives for both the α and 2α decays of ^{212}Po and ^{224}Ra is performed, using a self-consistent framework based on energy density functionals. A relativistic density functional and a separable pairing interaction of finite range are used to compute axially symmetric deformation energy surfaces as functions of quadrupole, octupole, and hexadecapole collective coordinates. Dynamical least-action paths are determined, that trace the α and 2α emission from the equilibrium deformation to the point of scission. The calculated half-lives for the α decay of ^{212}Po and ^{224}Ra are in good agreement with data. A new decay mode, the symmetric 2α emission, is predicted with half-lives of the order of those observed for cluster emission. |
